Release 4.14 drivers/pci/pci-driver.c

/*
 * drivers/pci/pci-driver.c
 *
 * (C) Copyright 2002-2004, 2007 Greg Kroah-Hartman <greg@kroah.com>
 * (C) Copyright 2007 Novell Inc.
 *
 * Released under the GPL v2 only.
 *
 */

#include <linux/pci.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/mempolicy.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/cpu.h>
#include <linux/pm_runtime.h>
#include <linux/suspend.h>
#include <linux/kexec.h>
#include "pci.h"


struct pci_dynid {
	
struct list_head node;
	
struct pci_device_id id;
};

/**
 * pci_add_dynid - add a new PCI device ID to this driver and re-probe devices
 * @drv: target pci driver
 * @vendor: PCI vendor ID
 * @device: PCI device ID
 * @subvendor: PCI subvendor ID
 * @subdevice: PCI subdevice ID
 * @class: PCI class
 * @class_mask: PCI class mask
 * @driver_data: private driver data
 *
 * Adds a new dynamic pci device ID to this driver and causes the
 * driver to probe for all devices again.  @drv must have been
 * registered prior to calling this function.
 *
 * CONTEXT:
 * Does GFP_KERNEL allocation.
 *
 * RETURNS:
 * 0 on success, -errno on failure.
 */


int pci_add_dynid(struct pci_driver *drv,
		  unsigned int vendor, unsigned int device,
		  unsigned int subvendor, unsigned int subdevice,
		  unsigned int class, unsigned int class_mask,
		  unsigned long driver_data)
{
	struct pci_dynid *dynid;

	dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
	if (!dynid)
		return -ENOMEM;

	dynid->id.vendor = vendor;
	dynid->id.device = device;
	dynid->id.subvendor = subvendor;
	dynid->id.subdevice = subdevice;
	dynid->id.class = class;
	dynid->id.class_mask = class_mask;
	dynid->id.driver_data = driver_data;

	spin_lock(&drv->dynids.lock);
	list_add_tail(&dynid->node, &drv->dynids.list);
	spin_unlock(&drv->dynids.lock);

	return driver_attach(&drv->driver);
}
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EXPORT_SYMBOL_GPL(pci_add_dynid);



static void pci_free_dynids(struct pci_driver *drv)
{
	struct pci_dynid *dynid, *n;

	spin_lock(&drv->dynids.lock);
	list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
		list_del(&dynid->node);
		kfree(dynid);
	}
	spin_unlock(&drv->dynids.lock);
}

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/**
 * store_new_id - sysfs frontend to pci_add_dynid()
 * @driver: target device driver
 * @buf: buffer for scanning device ID data
 * @count: input size
 *
 * Allow PCI IDs to be added to an existing driver via sysfs.
 */


static ssize_t new_id_store(struct device_driver *driver, const char *buf,
			    size_t count)
{
	struct pci_driver *pdrv = to_pci_driver(driver);
	const struct pci_device_id *ids = pdrv->id_table;
	__u32 vendor, device, subvendor = PCI_ANY_ID,
		subdevice = PCI_ANY_ID, class = 0, class_mask = 0;
	unsigned long driver_data = 0;
	int fields = 0;
	int retval = 0;

	fields = sscanf(buf, "%x %x %x %x %x %x %lx",
			&vendor, &device, &subvendor, &subdevice,
			&class, &class_mask, &driver_data);
	if (fields < 2)
		return -EINVAL;

	if (fields != 7) {
		struct pci_dev *pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
		if (!pdev)
			return -ENOMEM;

		pdev->vendor = vendor;
		pdev->device = device;
		pdev->subsystem_vendor = subvendor;
		pdev->subsystem_device = subdevice;
		pdev->class = class;

		if (pci_match_id(pdrv->id_table, pdev))
			retval = -EEXIST;

		kfree(pdev);

		if (retval)
			return retval;
	}

	/* Only accept driver_data values that match an existing id_table
           entry */
	if (ids) {
		retval = -EINVAL;
		while (ids->vendor || ids->subvendor || ids->class_mask) {
			if (driver_data == ids->driver_data) {
				retval = 0;
				break;
			}
			ids++;
		}
		if (retval)	/* No match */
			return retval;
	}

	retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice,
			       class, class_mask, driver_data);
	if (retval)
		return retval;
	return count;
}
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static DRIVER_ATTR_WO(new_id);

/**
 * store_remove_id - remove a PCI device ID from this driver
 * @driver: target device driver
 * @buf: buffer for scanning device ID data
 * @count: input size
 *
 * Removes a dynamic pci device ID to this driver.
 */


static ssize_t remove_id_store(struct device_driver *driver, const char *buf,
			       size_t count)
{
	struct pci_dynid *dynid, *n;
	struct pci_driver *pdrv = to_pci_driver(driver);
	__u32 vendor, device, subvendor = PCI_ANY_ID,
		subdevice = PCI_ANY_ID, class = 0, class_mask = 0;
	int fields = 0;
	size_t retval = -ENODEV;

	fields = sscanf(buf, "%x %x %x %x %x %x",
			&vendor, &device, &subvendor, &subdevice,
			&class, &class_mask);
	if (fields < 2)
		return -EINVAL;

	spin_lock(&pdrv->dynids.lock);
	list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) {
		struct pci_device_id *id = &dynid->id;
		if ((id->vendor == vendor) &&
		    (id->device == device) &&
		    (subvendor == PCI_ANY_ID || id->subvendor == subvendor) &&
		    (subdevice == PCI_ANY_ID || id->subdevice == subdevice) &&
		    !((id->class ^ class) & class_mask)) {
			list_del(&dynid->node);
			kfree(dynid);
			retval = count;
			break;
		}
	}
	spin_unlock(&pdrv->dynids.lock);

	return retval;
}
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static DRIVER_ATTR_WO(remove_id);


static struct attribute *pci_drv_attrs[] = {
	&driver_attr_new_id.attr,
	&driver_attr_remove_id.attr,
	NULL,
};

ATTRIBUTE_GROUPS(pci_drv);

/**
 * pci_match_id - See if a pci device matches a given pci_id table
 * @ids: array of PCI device id structures to search in
 * @dev: the PCI device structure to match against.
 *
 * Used by a driver to check whether a PCI device present in the
 * system is in its list of supported devices.  Returns the matching
 * pci_device_id structure or %NULL if there is no match.
 *
 * Deprecated, don't use this as it will not catch any dynamic ids
 * that a driver might want to check for.
 */


const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
					 struct pci_dev *dev)
{
	if (ids) {
		while (ids->vendor || ids->subvendor || ids->class_mask) {
			if (pci_match_one_device(ids, dev))
				return ids;
			ids++;
		}
	}
	return NULL;
}
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EXPORT_SYMBOL(pci_match_id);


static const struct pci_device_id pci_device_id_any = {
	.vendor = PCI_ANY_ID,
	.device = PCI_ANY_ID,
	.subvendor = PCI_ANY_ID,
	.subdevice = PCI_ANY_ID,
};

/**
 * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure
 * @drv: the PCI driver to match against
 * @dev: the PCI device structure to match against
 *
 * Used by a driver to check whether a PCI device present in the
 * system is in its list of supported devices.  Returns the matching
 * pci_device_id structure or %NULL if there is no match.
 */


static const struct pci_device_id *pci_match_device(struct pci_driver *drv,
						    struct pci_dev *dev)
{
	struct pci_dynid *dynid;
	const struct pci_device_id *found_id = NULL;

	/* When driver_override is set, only bind to the matching driver */
	if (dev->driver_override && strcmp(dev->driver_override, drv->name))
		return NULL;

	/* Look at the dynamic ids first, before the static ones */
	spin_lock(&drv->dynids.lock);
	list_for_each_entry(dynid, &drv->dynids.list, node) {
		if (pci_match_one_device(&dynid->id, dev)) {
			found_id = &dynid->id;
			break;
		}
	}
	spin_unlock(&drv->dynids.lock);

	if (!found_id)
		found_id = pci_match_id(drv->id_table, dev);

	/* driver_override will always match, send a dummy id */
	if (!found_id && dev->driver_override)
		found_id = &pci_device_id_any;

	return found_id;
}

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struct drv_dev_and_id {
	
struct pci_driver *drv;
	
struct pci_dev *dev;
	
const struct pci_device_id *id;
};



static long local_pci_probe(void *_ddi)
{
	struct drv_dev_and_id *ddi = _ddi;
	struct pci_dev *pci_dev = ddi->dev;
	struct pci_driver *pci_drv = ddi->drv;
	struct device *dev = &pci_dev->dev;
	int rc;

	/*
         * Unbound PCI devices are always put in D0, regardless of
         * runtime PM status.  During probe, the device is set to
         * active and the usage count is incremented.  If the driver
         * supports runtime PM, it should call pm_runtime_put_noidle(),
         * or any other runtime PM helper function decrementing the usage
         * count, in its probe routine and pm_runtime_get_noresume() in
         * its remove routine.
         */
	pm_runtime_get_sync(dev);
	pci_dev->driver = pci_drv;
	rc = pci_drv->probe(pci_dev, ddi->id);
	if (!rc)
		return rc;
	if (rc < 0) {
		pci_dev->driver = NULL;
		pm_runtime_put_sync(dev);
		return rc;
	}
	/*
         * Probe function should return < 0 for failure, 0 for success
         * Treat values > 0 as success, but warn.
         */
	dev_warn(dev, "Driver probe function unexpectedly returned %d\n", rc);
	return 0;
}

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static bool pci_physfn_is_probed(struct pci_dev *dev)
{
#ifdef CONFIG_PCI_IOV
	return dev->is_virtfn && dev->physfn->is_probed;
#else
	return false;
#endif
}

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static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
			  const struct pci_device_id *id)
{
	int error, node, cpu;
	struct drv_dev_and_id ddi = { drv, dev, id };

	/*
         * Execute driver initialization on node where the device is
         * attached.  This way the driver likely allocates its local memory
         * on the right node.
         */
	node = dev_to_node(&dev->dev);
	dev->is_probed = 1;

	cpu_hotplug_disable();

	/*
         * Prevent nesting work_on_cpu() for the case where a Virtual Function
         * device is probed from work_on_cpu() of the Physical device.
         */
	if (node < 0 || node >= MAX_NUMNODES || !node_online(node) ||
	    pci_physfn_is_probed(dev))
		cpu = nr_cpu_ids;
	else
		cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask);

	if (cpu < nr_cpu_ids)
		error = work_on_cpu(cpu, local_pci_probe, &ddi);
	else
		error = local_pci_probe(&ddi);

	dev->is_probed = 0;
	cpu_hotplug_enable();
	return error;
}

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/**
 * __pci_device_probe - check if a driver wants to claim a specific PCI device
 * @drv: driver to call to check if it wants the PCI device
 * @pci_dev: PCI device being probed
 *
 * returns 0 on success, else error.
 * side-effect: pci_dev->driver is set to drv when drv claims pci_dev.
 */


static int __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev)
{
	const struct pci_device_id *id;
	int error = 0;

	if (!pci_dev->driver && drv->probe) {
		error = -ENODEV;

		id = pci_match_device(drv, pci_dev);
		if (id)
			error = pci_call_probe(drv, pci_dev, id);
	}
	return error;
}

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int __weak pcibios_alloc_irq(struct pci_dev *dev)
{
	return 0;
}

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void __weak pcibios_free_irq(struct pci_dev *dev)
{
}

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#ifdef CONFIG_PCI_IOV


static inline bool pci_device_can_probe(struct pci_dev *pdev)
{
	return (!pdev->is_virtfn || pdev->physfn->sriov->drivers_autoprobe);
}
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#else


static inline bool pci_device_can_probe(struct pci_dev *pdev)
{
	return true;
}
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#endif



static int pci_device_probe(struct device *dev)
{
	int error;
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct pci_driver *drv = to_pci_driver(dev->driver);

	pci_assign_irq(pci_dev);

	error = pcibios_alloc_irq(pci_dev);
	if (error < 0)
		return error;

	pci_dev_get(pci_dev);
	if (pci_device_can_probe(pci_dev)) {
		error = __pci_device_probe(drv, pci_dev);
		if (error) {
			pcibios_free_irq(pci_dev);
			pci_dev_put(pci_dev);
		}
	}

	return error;
}

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static int pci_device_remove(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct pci_driver *drv = pci_dev->driver;

	if (drv) {
		if (drv->remove) {
			pm_runtime_get_sync(dev);
			drv->remove(pci_dev);
			pm_runtime_put_noidle(dev);
		}
		pcibios_free_irq(pci_dev);
		pci_dev->driver = NULL;
	}

	/* Undo the runtime PM settings in local_pci_probe() */
	pm_runtime_put_sync(dev);

	/*
         * If the device is still on, set the power state as "unknown",
         * since it might change by the next time we load the driver.
         */
	if (pci_dev->current_state == PCI_D0)
		pci_dev->current_state = PCI_UNKNOWN;

	/*
         * We would love to complain here if pci_dev->is_enabled is set, that
         * the driver should have called pci_disable_device(), but the
         * unfortunate fact is there are too many odd BIOS and bridge setups
         * that don't like drivers doing that all of the time.
         * Oh well, we can dream of sane hardware when we sleep, no matter how
         * horrible the crap we have to deal with is when we are awake...
         */

	pci_dev_put(pci_dev);
	return 0;
}

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static void pci_device_shutdown(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct pci_driver *drv = pci_dev->driver;

	pm_runtime_resume(dev);

	if (drv && drv->shutdown)
		drv->shutdown(pci_dev);

	/*
         * If this is a kexec reboot, turn off Bus Master bit on the
         * device to tell it to not continue to do DMA. Don't touch
         * devices in D3cold or unknown states.
         * If it is not a kexec reboot, firmware will hit the PCI
         * devices with big hammer and stop their DMA any way.
         */
	if (kexec_in_progress && (pci_dev->current_state <= PCI_D3hot))
		pci_clear_master(pci_dev);
}

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#ifdef CONFIG_PM

/* Auxiliary functions used for system resume and run-time resume. */

/**
 * pci_restore_standard_config - restore standard config registers of PCI device
 * @pci_dev: PCI device to handle
 */


static int pci_restore_standard_config(struct pci_dev *pci_dev)
{
	pci_update_current_state(pci_dev, PCI_UNKNOWN);

	if (pci_dev->current_state != PCI_D0) {
		int error = pci_set_power_state(pci_dev, PCI_D0);
		if (error)
			return error;
	}

	pci_restore_state(pci_dev);
	pci_pme_restore(pci_dev);
	return 0;
}

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#endif

#ifdef CONFIG_PM_SLEEP



static void pci_pm_default_resume_early(struct pci_dev *pci_dev)
{
	pci_power_up(pci_dev);
	pci_restore_state(pci_dev);
	pci_pme_restore(pci_dev);
	pci_fixup_device(pci_fixup_resume_early, pci_dev);
}

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/*
 * Default "suspend" method for devices that have no driver provided suspend,
 * or not even a driver at all (second part).
 */


static void pci_pm_set_unknown_state(struct pci_dev *pci_dev)
{
	/*
         * mark its power state as "unknown", since we don't know if
         * e.g. the BIOS will change its device state when we suspend.
         */
	if (pci_dev->current_state == PCI_D0)
		pci_dev->current_state = PCI_UNKNOWN;
}

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/*
 * Default "resume" method for devices that have no driver provided resume,
 * or not even a driver at all (second part).
 */


static int pci_pm_reenable_device(struct pci_dev *pci_dev)
{
	int retval;

	/* if the device was enabled before suspend, reenable */
	retval = pci_reenable_device(pci_dev);
	/*
         * if the device was busmaster before the suspend, make it busmaster
         * again
         */
	if (pci_dev->is_busmaster)
		pci_set_master(pci_dev);

	return retval;
}

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3
100.00%



static int pci_legacy_suspend(struct device *dev, pm_message_t state)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct pci_driver *drv = pci_dev->driver;

	if (drv && drv->suspend) {
		pci_power_t prev = pci_dev->current_state;
		int error;

		error = drv->suspend(pci_dev, state);
		suspend_report_result(drv->suspend, error);
		if (error)
			return error;

		if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
		    && pci_dev->current_state != PCI_UNKNOWN) {
			WARN_ONCE(pci_dev->current_state != prev,
				"PCI PM: Device state not saved by %pF\n",
				drv->suspend);
		}
	}

	pci_fixup_device(pci_fixup_suspend, pci_dev);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
60
47.62%
5
38.46%
Matt Domsch
48
38.10%
3
23.08%
Andrew Morton
10
7.94%
1
7.69%
Frans Pop
4
3.17%
1
7.69%
Pavel Machek
2
1.59%
2
15.38%
Arjan van de Ven
2
1.59%
1
7.69%
Total
126
100.00%
13
100.00%



static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct pci_driver *drv = pci_dev->driver;

	if (drv && drv->suspend_late) {
		pci_power_t prev = pci_dev->current_state;
		int error;

		error = drv->suspend_late(pci_dev, state);
		suspend_report_result(drv->suspend_late, error);
		if (error)
			return error;

		if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
		    && pci_dev->current_state != PCI_UNKNOWN) {
			WARN_ONCE(pci_dev->current_state != prev,
				"PCI PM: Device state not saved by %pF\n",
				drv->suspend_late);
			goto Fixup;
		}
	}

	if (!pci_dev->state_saved)
		pci_save_state(pci_dev);

	pci_pm_set_unknown_state(pci_dev);

Fixup:
	pci_fixup_device(pci_fixup_suspend_late, pci_dev);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
72
48.65%
2
40.00%
Linus Torvalds
61
41.22%
1
20.00%
Andreas Noever
12
8.11%
1
20.00%
Frans Pop
3
2.03%
1
20.00%
Total
148
100.00%
5
100.00%



static int pci_legacy_resume_early(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct pci_driver *drv = pci_dev->driver;

	return drv && drv->resume_early ?
			drv->resume_early(pci_dev) : 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
34
73.91%
3
50.00%
Arjan van de Ven
9
19.57%
1
16.67%
Jean Delvare
2
4.35%
1
16.67%
Greg Kroah-Hartman
1
2.17%
1
16.67%
Total
46
100.00%
6
100.00%



static int pci_legacy_resume(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct pci_driver *drv = pci_dev->driver;

	pci_fixup_device(pci_fixup_resume, pci_dev);

	return drv && drv->resume ?
			drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
53
94.64%
4
80.00%
Arjan van de Ven
3
5.36%
1
20.00%
Total
56
100.00%
5
100.00%

/* Auxiliary functions used by the new power management framework */



static void pci_pm_default_resume(struct pci_dev *pci_dev)
{
	pci_fixup_device(pci_fixup_resume, pci_dev);
	pci_enable_wake(pci_dev, PCI_D0, false);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
27
100.00%
3
100.00%
Total
27
100.00%
3
100.00%



static void pci_pm_default_suspend(struct pci_dev *pci_dev)
{
	/* Disable non-bridge devices without PM support */
	if (!pci_has_subordinate(pci_dev))
		pci_disable_enabled_device(pci_dev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
24
96.00%
2
66.67%
Yijing Wang
1
4.00%
1
33.33%
Total
25
100.00%
3
100.00%



static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
{
	struct pci_driver *drv = pci_dev->driver;
	bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume
		|| drv->resume_early);

	/*
         * Legacy PM support is used by default, so warn if the new framework is
         * supported as well.  Drivers are supposed to support either the
         * former, or the latter, but not both at the same time.
         */
	WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n",
		drv->name, pci_dev->vendor, pci_dev->device);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
57
79.17%
2
66.67%
David Fries
15
20.83%
1
33.33%
Total
72
100.00%
3
100.00%

/* New power management framework */



static int pci_pm_prepare(struct device *dev)
{
	struct device_driver *drv = dev->driver;

	/*
         * Devices having power.ignore_children set may still be necessary for
         * suspending their children in the next phase of device suspend.
         */
	if (dev->power.ignore_children)
		pm_runtime_resume(dev);

	if (drv && drv->pm && drv->pm->prepare) {
		int error = drv->pm->prepare(dev);
		if (error)
			return error;
	}
	return pci_dev_keep_suspended(to_pci_dev(dev));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
78
100.00%
5
100.00%
Total
78
100.00%
5
100.00%



static void pci_pm_complete(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);

	pci_dev_complete_resume(pci_dev);
	pm_generic_complete(dev);

	/* Resume device if platform firmware has put it in reset-power-on */
	if (dev->power.direct_complete && pm_resume_via_firmware()) {
		pci_power_t pre_sleep_state = pci_dev->current_state;

		pci_update_current_state(pci_dev, pci_dev->current_state);
		if (pci_dev->current_state < pre_sleep_state)
			pm_request_resume(dev);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Lukas Wunner
52
70.27%
1
33.33%
Rafael J. Wysocki
22
29.73%
2
66.67%
Total
74
100.00%
3
100.00%

#else /* !CONFIG_PM_SLEEP */


#define pci_pm_prepare	NULL

#define pci_pm_complete	NULL

#endif /* !CONFIG_PM_SLEEP */

#ifdef CONFIG_SUSPEND



static int pci_pm_suspend(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_suspend(dev, PMSG_SUSPEND);

	if (!pm) {
		pci_pm_default_suspend(pci_dev);
		goto Fixup;
	}

	/*
         * PCI devices suspended at run time need to be resumed at this point,
         * because in general it is necessary to reconfigure them for system
         * suspend.  Namely, if the device is supposed to wake up the system
         * from the sleep state, we may need to reconfigure it for this purpose.
         * In turn, if the device is not supposed to wake up the system from the
         * sleep state, we'll have to prevent it from signaling wake-up.
         */
	pm_runtime_resume(dev);

	pci_dev->state_saved = false;
	if (pm->suspend) {
		pci_power_t prev = pci_dev->current_state;
		int error;

		error = pm->suspend(dev);
		suspend_report_result(pm->suspend, error);
		if (error)
			return error;

		if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
		    && pci_dev->current_state != PCI_UNKNOWN) {
			WARN_ONCE(pci_dev->current_state != prev,
				"PCI PM: State of device not saved by %pF\n",
				pm->suspend);
		}
	}

 Fixup:
	pci_fixup_device(pci_fixup_suspend, pci_dev);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
171
99.42%
10
90.91%
Dmitry Torokhov
1
0.58%
1
9.09%
Total
172
100.00%
11
100.00%



static int pci_pm_suspend_noirq(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_suspend_late(dev, PMSG_SUSPEND);

	if (!pm) {
		pci_save_state(pci_dev);
		goto Fixup;
	}

	if (pm->suspend_noirq) {
		pci_power_t prev = pci_dev->current_state;
		int error;

		error = pm->suspend_noirq(dev);
		suspend_report_result(pm->suspend_noirq, error);
		if (error)
			return error;

		if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
		    && pci_dev->current_state != PCI_UNKNOWN) {
			WARN_ONCE(pci_dev->current_state != prev,
				"PCI PM: State of device not saved by %pF\n",
				pm->suspend_noirq);
			goto Fixup;
		}
	}

	if (!pci_dev->state_saved) {
		pci_save_state(pci_dev);
		if (pci_power_manageable(pci_dev))
			pci_prepare_to_sleep(pci_dev);
	}

	pci_pm_set_unknown_state(pci_dev);

	/*
         * Some BIOSes from ASUS have a bug: If a USB EHCI host controller's
         * PCI COMMAND register isn't 0, the BIOS assumes that the controller
         * hasn't been quiesced and tries to turn it off.  If the controller
         * is already in D3, this can hang or cause memory corruption.
         *
         * Since the value of the COMMAND register doesn't matter once the
         * device has been suspended, we can safely set it to 0 here.
         */
	if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI)
		pci_write_config_word(pci_dev, PCI_COMMAND, 0);

Fixup:
	pci_fixup_device(pci_fixup_suspend_late, pci_dev);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
177
83.49%
7
63.64%
Alan Stern
18
8.49%
1
9.09%
Andreas Noever
15
7.08%
1
9.09%
Mika Westerberg
1
0.47%
1
9.09%
Dmitry Torokhov
1
0.47%
1
9.09%
Total
212
100.00%
11
100.00%



static int pci_pm_resume_noirq(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct device_driver *drv = dev->driver;
	int error = 0;

	pci_pm_default_resume_early(pci_dev);

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_resume_early(dev);

	if (drv && drv->pm && drv->pm->resume_noirq)
		error = drv->pm->resume_noirq(dev);

	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
81
100.00%
7
100.00%
Total
81
100.00%
7
100.00%



static int pci_pm_resume(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
	int error = 0;

	/*
         * This is necessary for the suspend error path in which resume is
         * called without restoring the standard config registers of the device.
         */
	if (pci_dev->state_saved)
		pci_restore_standard_config(pci_dev);

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_resume(dev);

	pci_pm_default_resume(pci_dev);

	if (pm) {
		if (pm->resume)
			error = pm->resume(dev);
	} else {
		pci_pm_reenable_device(pci_dev);
	}

	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
105
99.06%
9
90.00%
Dmitry Torokhov
1
0.94%
1
10.00%
Total
106
100.00%
10
100.00%

#else /* !CONFIG_SUSPEND */


#define pci_pm_suspend		NULL

#define pci_pm_suspend_noirq	NULL

#define pci_pm_resume		NULL

#define pci_pm_resume_noirq	NULL

#endif /* !CONFIG_SUSPEND */

#ifdef CONFIG_HIBERNATE_CALLBACKS


/*
 * pcibios_pm_ops - provide arch-specific hooks when a PCI device is doing
 * a hibernate transition
 */

struct dev_pm_ops __weak pcibios_pm_ops;



static int pci_pm_freeze(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_suspend(dev, PMSG_FREEZE);

	if (!pm) {
		pci_pm_default_suspend(pci_dev);
		return 0;
	}

	/*
         * This used to be done in pci_pm_prepare() for all devices and some
         * drivers may depend on it, so do it here.  Ideally, runtime-suspended
         * devices should not be touched during freeze/thaw transitions,
         * however.
         */
	pm_runtime_resume(dev);

	pci_dev->state_saved = false;
	if (pm->freeze) {
		int error;

		error = pm->freeze(dev);
		suspend_report_result(pm->freeze, error);
		if (error)
			return error;
	}

	if (pcibios_pm_ops.freeze)
		return pcibios_pm_ops.freeze(dev);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
119
88.81%
6
75.00%
Sebastian Ott
14
10.45%
1
12.50%
Dmitry Torokhov
1
0.75%
1
12.50%
Total
134
100.00%
8
100.00%



static int pci_pm_freeze_noirq(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct device_driver *drv = dev->driver;

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_suspend_late(dev, PMSG_FREEZE);

	if (drv && drv->pm && drv->pm->freeze_noirq) {
		int error;

		error = drv->pm->freeze_noirq(dev);
		suspend_report_result(drv->pm->freeze_noirq, error);
		if (error)
			return error;
	}

	if (!pci_dev->state_saved)
		pci_save_state(pci_dev);

	pci_pm_set_unknown_state(pci_dev);

	if (pcibios_pm_ops.freeze_noirq)
		return pcibios_pm_ops.freeze_noirq(dev);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
113
88.98%
6
85.71%
Sebastian Ott
14
11.02%
1
14.29%
Total
127
100.00%
7
100.00%



static int pci_pm_thaw_noirq(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct device_driver *drv = dev->driver;
	int error = 0;

	if (pcibios_pm_ops.thaw_noirq) {
		error = pcibios_pm_ops.thaw_noirq(dev);
		if (error)
			return error;
	}

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_resume_early(dev);

	pci_update_current_state(pci_dev, PCI_D0);
	pci_restore_state(pci_dev);

	if (drv && drv->pm && drv->pm->thaw_noirq)
		error = drv->pm->thaw_noirq(dev);

	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
83
74.11%
5
71.43%
Sebastian Ott
24
21.43%
1
14.29%
Chen Yu
5
4.46%
1
14.29%
Total
112
100.00%
7
100.00%



static int pci_pm_thaw(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
	int error = 0;

	if (pcibios_pm_ops.thaw) {
		error = pcibios_pm_ops.thaw(dev);
		if (error)
			return error;
	}

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_resume(dev);

	if (pm) {
		if (pm->thaw)
			error = pm->thaw(dev);
	} else {
		pci_pm_reenable_device(pci_dev);
	}

	pci_dev->state_saved = false;

	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
94
78.99%
7
77.78%
Sebastian Ott
24
20.17%
1
11.11%
Dmitry Torokhov
1
0.84%
1
11.11%
Total
119
100.00%
9
100.00%



static int pci_pm_poweroff(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_suspend(dev, PMSG_HIBERNATE);

	if (!pm) {
		pci_pm_default_suspend(pci_dev);
		goto Fixup;
	}

	/* The reason to do that is the same as in pci_pm_suspend(). */
	pm_runtime_resume(dev);

	pci_dev->state_saved = false;
	if (pm->poweroff) {
		int error;

		error = pm->poweroff(dev);
		suspend_report_result(pm->poweroff, error);
		if (error)
			return error;
	}

 Fixup:
	pci_fixup_device(pci_fixup_suspend, pci_dev);

	if (pcibios_pm_ops.poweroff)
		return pcibios_pm_ops.poweroff(dev);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
128
89.51%
11
84.62%
Sebastian Ott
14
9.79%
1
7.69%
Dmitry Torokhov
1
0.70%
1
7.69%
Total
143
100.00%
13
100.00%



static int pci_pm_poweroff_noirq(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct device_driver *drv = dev->driver;

	if (pci_has_legacy_pm_support(to_pci_dev(dev)))
		return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);

	if (!drv || !drv->pm) {
		pci_fixup_device(pci_fixup_suspend_late, pci_dev);
		return 0;
	}

	if (drv->pm->poweroff_noirq) {
		int error;

		error = drv->pm->poweroff_noirq(dev);
		suspend_report_result(drv->pm->poweroff_noirq, error);
		if (error)
			return error;
	}

	if (!pci_dev->state_saved && !pci_has_subordinate(pci_dev))
		pci_prepare_to_sleep(pci_dev);

	/*
         * The reason for doing this here is the same as for the analogous code
         * in pci_pm_suspend_noirq().
         */
	if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI)
		pci_write_config_word(pci_dev, PCI_COMMAND, 0);

	pci_fixup_device(pci_fixup_suspend_late, pci_dev);

	if (pcibios_pm_ops.poweroff_noirq)
		return pcibios_pm_ops.poweroff_noirq(dev);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
138
80.23%
5
50.00%
Andreas Noever
16
9.30%
1
10.00%
Sebastian Ott
14
8.14%
1
10.00%
Jean Delvare
2
1.16%
1
10.00%
Arjan van de Ven
1
0.58%
1
10.00%
Yijing Wang
1
0.58%
1
10.00%
Total
172
100.00%
10
100.00%



static int pci_pm_restore_noirq(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct device_driver *drv = dev->driver;
	int error = 0;

	if (pcibios_pm_ops.restore_noirq) {
		error = pcibios_pm_ops.restore_noirq(dev);
		if (error)
			return error;
	}

	pci_pm_default_resume_early(pci_dev);

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_resume_early(dev);

	if (drv && drv->pm && drv->pm->restore_noirq)
		error = drv->pm->restore_noirq(dev);

	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rafael J. Wysocki
43
40.95%
7
63.64%
Matt Domsch
37
35.24%
2
18.18%
Sebastian Ott
24
22.86%
1
9.09%
Jean Delvare
1
0.95%
1
9.09%
Total
105
100.00%
11
100.00%



static int pci_pm_restore(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
	int error = 0;

	if (pcibios_pm_ops.restore) {
		error = pcibios_pm_ops.restore(dev);
		if (error)
			return error;
	}

	/*
         * This is necessary for the hibernation error path in which restore is
         * called without restoring the standard config registers of the device.
         */
	if (pci_dev->state_saved)
		pci_restore_standard_config(pci_dev);

	if (pci_has_legacy_pm_support(pci_dev))
		return pci_legacy_resume(dev);

	pci_pm_default_resume(pci_dev);

	if (pm) {
		if (pm->restore)
			error = pm->restore(dev);
	} else {
		pci_pm_reenable_device(pci_dev);
	}

	return error;
}

Contributors
Person
Tokens
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Commits
CommitProp
Rafael J. Wysocki
73
56.15%
7
63.64%
Linus Torvalds
27
20.77%
1
9.09%
Sebastian Ott
24
18.46%
1
9.09%
Greg Kroah-Hartman
5
3.85%
1
9.09%
Dmitry Torokhov
1
0.77%
1
9.09%
Total
130
100.00%
11
100.00%

#else /* !CONFIG_HIBERNATE_CALLBACKS */


#define pci_pm_freeze		NULL

#define pci_pm_freeze_noirq	NULL

#define pci_pm_thaw		NULL

#define pci_pm_thaw_noirq	NULL

#define pci_pm_poweroff		NULL

#define pci_pm_poweroff_noirq	NULL

#define pci_pm_restore		NULL

#define pci_pm_restore_noirq	NULL

#endif /* !CONFIG_HIBERNATE_CALLBACKS */

#ifdef CONFIG_PM



static int pci_pm_runtime_suspend(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
	pci_power_t prev = pci_dev->current_state;
	int error;

	/*
         * If pci_dev->driver is not set (unbound), the device should
         * always remain in D0 regardless of the runtime PM status
         */
	if (!pci_dev->driver)
		return 0;

	if (!pm || !pm->runtime_suspend)
		return -ENOSYS;

	pci_dev->state_saved = false;
	error = pm->runtime_suspend(dev);
	if (error) {
		/*
                 * -EBUSY and -EAGAIN is used to request the runtime PM core
                 * to schedule a new suspend, so log the event only with debug
                 * log level.
                 */
		if (error == -EBUSY || error == -EAGAIN)
			dev_dbg(dev, "can't suspend now (%pf returned %d)\n",
				pm->runtime_suspend, error);
		else
			dev_err(dev, "can't suspend (%pf returned %d)\n",
				pm->runtime_suspend, error);

		return error;
	}

	pci_fixup_device(pci_fixup_suspend, pci_dev);

	if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
	    && pci_dev->current_state != PCI_UNKNOWN) {
		WARN_ONCE(pci_dev->current_state != prev,
			"PCI PM: State of device not saved by %pF\n",
			pm->runtime_suspend);
		return 0;
	}

	if (!pci_dev->state_saved) {
		pci_save_state(pci_dev);
		pci_finish_runtime_suspend(pci_dev);
	}

	return 0;
}

Contributors
Person
Tokens
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Rafael J. Wysocki
153
74.27%
4
44.44%
Imre Deak
37
17.96%
1
11.11%
Huang Ying
13
6.31%
2
22.22%
Dave Airlie
2
0.97%
1
11.11%
Dmitry Torokhov
1
0.49%
1
11.11%
Total
206
100.00%
9
100.00%



static int pci_pm_runtime_resume(struct device *dev)
{
	int rc;
	struct pci_dev *pci_dev = to_pci_dev(dev);
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;

	/*
         * If pci_dev->driver is not set (unbound), the device should
         * always remain in D0 regardless of the runtime PM status
         */
	if (!pci_dev->driver)
		return 0;

	if (!pm || !pm->runtime_resume)
		return -ENOSYS;

	pci_restore_standard_config(pci_dev);
	pci_fixup_device(pci_fixup_resume_early, pci_dev);
	pci_enable_wake(pci_dev, PCI_D0, false);
	pci_fixup_device(pci_fixup_resume, pci_dev);

	rc = pm->runtime_resume(dev);

	pci_dev->runtime_d3cold = false;

	return rc;
}

Contributors
Person
Tokens
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Rafael J. Wysocki
88
77.88%
3
60.00%
Huang Ying
25
22.12%
2
40.00%
Total
113
100.00%
5
100.00%



static int pci_pm_runtime_idle(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
	int ret = 0;

	/*
         * If pci_dev->driver is not set (unbound), the device should
         * always remain in D0 regardless of the runtime PM status
         */
	if (!pci_dev->driver)
		return 0;

	if (!pm)
		return -ENOSYS;

	if (pm->runtime_idle)
		ret = pm->runtime_idle(dev);

	return ret;
}

Contributors
Person
Tokens
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CommitProp
Rafael J. Wysocki
64
78.05%
2
66.67%
Huang Ying
18
21.95%
1
33.33%
Total
82
100.00%
3
100.00%


static const struct dev_pm_ops pci_dev_pm_ops = {
	.prepare = pci_pm_prepare,
	.complete = pci_pm_complete,
	.suspend = pci_pm_suspend,
	.resume = pci_pm_resume,
	.freeze = pci_pm_freeze,
	.thaw = pci_pm_thaw,
	.poweroff = pci_pm_poweroff,
	.restore = pci_pm_restore,
	.suspend_noirq = pci_pm_suspend_noirq,
	.resume_noirq = pci_pm_resume_noirq,
	.freeze_noirq = pci_pm_freeze_noirq,
	.thaw_noirq = pci_pm_thaw_noirq,
	.poweroff_noirq = pci_pm_poweroff_noirq,
	.restore_noirq = pci_pm_restore_noirq,
	.runtime_suspend = pci_pm_runtime_suspend,
	.runtime_resume = pci_pm_runtime_resume,
	.runtime_idle = pci_pm_runtime_idle,
};


#define PCI_PM_OPS_PTR	(&pci_dev_pm_ops)

#else /* !CONFIG_PM */


#define pci_pm_runtime_suspend	NULL

#define pci_pm_runtime_resume	NULL

#define pci_pm_runtime_idle	NULL


#define PCI_PM_OPS_PTR	NULL

#endif /* !CONFIG_PM */

/**
 * __pci_register_driver - register a new pci driver
 * @drv: the driver structure to register
 * @owner: owner module of drv
 * @mod_name: module name string
 *
 * Adds the driver structure to the list of registered drivers.
 * Returns a negative value on error, otherwise 0.
 * If no error occurred, the driver remains registered even if
 * no device was claimed during registration.
 */


int __pci_register_driver(struct pci_driver *drv, struct module *owner,
			  const char *mod_name)
{
	/* initialize common driver fields */
	drv->driver.name = drv->name;
	drv->driver.bus = &pci_bus_type;
	drv->driver.owner = owner;
	drv->driver.mod_name = mod_name;
	drv->driver.groups = drv->groups;

	spin_lock_init(&drv->dynids.lock);
	INIT_LIST_HEAD(&drv->dynids.list);

	/* register with core */
	return driver_register(&drv->driver);
}
Contributors
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Greg Kroah-Hartman
45
46.88%
6
50.00%
Patrick Mochel
34
35.42%
1
8.33%
Matt Domsch
7
7.29%
1
8.33%
Laurent Riffard
6
6.25%
1
8.33%
Linus Torvalds
2
2.08%
1
8.33%
Konstantin Khlebnikov
1
1.04%
1
8.33%
Chris Wright
1
1.04%
1
8.33%
Total
96
100.00%
12
100.00%


EXPORT_SYMBOL(__pci_register_driver);

/**
 * pci_unregister_driver - unregister a pci driver
 * @drv: the driver structure to unregister
 *
 * Deletes the driver structure from the list of registered PCI drivers,
 * gives it a chance to clean up by calling its remove() function for
 * each device it was responsible for, and marks those devices as
 * driverless.
 */



void pci_unregister_driver(struct pci_driver *drv)
{
	driver_unregister(&drv->driver);
	pci_free_dynids(drv);
}
Contributors
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Patrick Mochel
17
73.91%
2
50.00%
Matt Domsch
5
21.74%
1
25.00%
Ryan Desfosses
1
4.35%
1
25.00%
Total
23
100.00%
4
100.00%


EXPORT_SYMBOL(pci_unregister_driver);


static struct pci_driver pci_compat_driver = {
	.name = "compat"
};

/**
 * pci_dev_driver - get the pci_driver of a device
 * @dev: the device to query
 *
 * Returns the appropriate pci_driver structure or %NULL if there is no
 * registered driver for the device.
 */


struct pci_driver *pci_dev_driver(const struct pci_dev *dev)
{
	if (dev->driver)
		return dev->driver;
	else {
		int i;
		for (i = 0; i <= PCI_ROM_RESOURCE; i++)
			if (dev->resource[i].flags & IORESOURCE_BUSY)
				return &pci_compat_driver;
	}
	return NULL;
}
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Patrick Mochel
63
100.00%
1
100.00%
Total
63
100.00%
1
100.00%


EXPORT_SYMBOL(pci_dev_driver);

/**
 * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure
 * @dev: the PCI device structure to match against
 * @drv: the device driver to search for matching PCI device id structures
 *
 * Used by a driver to check whether a PCI device present in the
 * system is in its list of supported devices. Returns the matching
 * pci_device_id structure or %NULL if there is no match.
 */


static int pci_bus_match(struct device *dev, struct device_driver *drv)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct pci_driver *pci_drv;
	const struct pci_device_id *found_id;

	if (!pci_dev->match_driver)
		return 0;

	pci_drv = to_pci_driver(drv);
	found_id = pci_match_device(pci_drv, pci_dev);
	if (found_id)
		return 1;

	return 0;
}

Contributors
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Patrick Mochel
37
50.68%
2
33.33%
Yinghai Lu
17
23.29%
1
16.67%
Matt Domsch
16
21.92%
1
16.67%
Greg Kroah-Hartman
2
2.74%
1
16.67%
Neil Brown
1
1.37%
1
16.67%
Total
73
100.00%
6
100.00%

/**
 * pci_dev_get - increments the reference count of the pci device structure
 * @dev: the device being referenced
 *
 * Each live reference to a device should be refcounted.
 *
 * Drivers for PCI devices should normally record such references in
 * their probe() methods, when they bind to a device, and release
 * them by calling pci_dev_put(), in their disconnect() methods.
 *
 * A pointer to the device with the incremented reference counter is returned.
 */


struct pci_dev *pci_dev_get(struct pci_dev *dev)
{
	if (dev)
		get_device(&dev->dev);
	return dev;
}
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Greg Kroah-Hartman
27
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3
100.00%
Total
27
100.00%
3
100.00%


EXPORT_SYMBOL(pci_dev_get);

/**
 * pci_dev_put - release a use of the pci device structure
 * @dev: device that's been disconnected
 *
 * Must be called when a user of a device is finished with it.  When the last
 * user of the device calls this function, the memory of the device is freed.
 */


void pci_dev_put(struct pci_dev *dev)
{
	if (dev)
		put_device(&dev->dev);
}
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Greg Kroah-Hartman
22
100.00%
2
100.00%
Total
22
100.00%
2
100.00%


EXPORT_SYMBOL(pci_dev_put);



static int pci_uevent(struct device *dev, struct kobj_uevent_env *env)
{
	struct pci_dev *pdev;

	if (!dev)
		return -ENODEV;

	pdev = to_pci_dev(dev);

	if (add_uevent_var(env, "PCI_CLASS=%04X", pdev->class))
		return -ENOMEM;

	if (add_uevent_var(env, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device))
		return -ENOMEM;

	if (add_uevent_var(env, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor,
			   pdev->subsystem_device))
		return -ENOMEM;

	if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev)))
		return -ENOMEM;

	if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X",
			   pdev->vendor, pdev->device,
			   pdev->subsystem_vendor, pdev->subsystem_device,
			   (u8)(pdev->class >> 16), (u8)(pdev->class >> 8),
			   (u8)(pdev->class)))
		return -ENOMEM;

	return 0;
}

Contributors
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Bill Pemberton
176
99.44%
1
50.00%
Ricardo Ribalda Delgado
1
0.56%
1
50.00%
Total
177
100.00%
2
100.00%



static int pci_bus_num_vf(struct device *dev)
{
	return pci_num_vf(to_pci_dev(dev));
}

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Phil Sutter
20
100.00%
1
100.00%
Total
20
100.00%
1
100.00%


struct bus_type pci_bus_type = {
	.name		= "pci",
	.match		= pci_bus_match,
	.uevent		= pci_uevent,
	.probe		= pci_device_probe,
	.remove		= pci_device_remove,
	.shutdown	= pci_device_shutdown,
	.dev_groups	= pci_dev_groups,
	.bus_groups	= pci_bus_groups,
	.drv_groups	= pci_drv_groups,
	.pm		= PCI_PM_OPS_PTR,
	.num_vf		= pci_bus_num_vf,
};

EXPORT_SYMBOL(pci_bus_type);



static int __init pci_driver_init(void)
{
	return bus_register(&pci_bus_type);
}
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Patrick Mochel
16
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1
100.00%
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16
100.00%
1
100.00%


postcore_initcall(pci_driver_init);
Overall Contributors
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Rafael J. Wysocki
2480
45.28%
36
25.35%
Matt Domsch
485
8.86%
5
3.52%
Greg Kroah-Hartman
240
4.38%
18
12.68%
Tejun Heo
237
4.33%
1
0.70%
Chris Wright
232
4.24%
2
1.41%
Patrick Mochel
201
3.67%
8
5.63%
Bill Pemberton
176
3.21%
1
0.70%
Sebastian Ott
158
2.88%
1
0.70%
Linus Torvalds
108
1.97%
2
1.41%
Huang Ying
97
1.77%
4
2.82%
Rusty Russell
93
1.70%
2
1.41%
Bandan Das
93
1.70%
1
0.70%
Alex Williamson
86
1.57%
1
0.70%
Thomas Gleixner
69
1.26%
2
1.41%
Alan Stern
66
1.21%
3
2.11%
Bodong Wang
59
1.08%
1
0.70%
Jiang Liu
58
1.06%
1
0.70%
Andi Kleen
58
1.06%
1
0.70%
Lukas Wunner
52
0.95%
1
0.70%
Jean Delvare
51
0.93%
3
2.11%
Andreas Noever
43
0.79%
1
0.70%
Ryan Desfosses
41
0.75%
2
1.41%
Imre Deak
37
0.68%
1
0.70%
Phil Sutter
25
0.46%
1
0.70%
Stephen M. Cameron
24
0.44%
1
0.70%
Yinghai Lu
20
0.37%
2
1.41%
Russell King
18
0.33%
2
1.41%
Konstantin Khlebnikov
17
0.31%
3
2.11%
David Fries
15
0.27%
1
0.70%
David Shaohua Li
15
0.27%
1
0.70%
Arjan van de Ven
15
0.27%
1
0.70%
Khalid Aziz
12
0.22%
2
1.41%
Andrew Morton
10
0.18%
1
0.70%
Tim Schmielau
9
0.16%
2
1.41%
Dmitry Torokhov
8
0.15%
1
0.70%
Art Haas
8
0.15%
1
0.70%
Frans Pop
7
0.13%
1
0.70%
Björn Helgaas
6
0.11%
1
0.70%
Laurent Riffard
6
0.11%
1
0.70%
Chen Yu
5
0.09%
1
0.70%
Matthew Minter
5
0.09%
1
0.70%
Jon Mason
3
0.05%
1
0.70%
Alexander Chiang
3
0.05%
1
0.70%
Tom Rini
3
0.05%
1
0.70%
Alexander Duyck
2
0.04%
1
0.70%
Dave Airlie
2
0.04%
1
0.70%
Pavel Machek
2
0.04%
2
1.41%
Kay Sievers
2
0.04%
1
0.70%
Yijing Wang
2
0.04%
1
0.70%
Mike Travis
2
0.04%
1
0.70%
Zhen Lei
2
0.04%
1
0.70%
Randy Dunlap
2
0.04%
2
1.41%
Michael Ellerman
1
0.02%
1
0.70%
Mika Westerberg
1
0.02%
1
0.70%
Tobias Klauser
1
0.02%
1
0.70%
Sachin Kamat
1
0.02%
1
0.70%
Neil Brown
1
0.02%
1
0.70%
Ricardo Ribalda Delgado
1
0.02%
1
0.70%
Adrian Bunk
1
0.02%
1
0.70%
Total
5477
100.00%
142
100.00%
Directory: drivers/pci

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