Release 4.17 drivers/base/firmware_loader/main.c

// SPDX-License-Identifier: GPL-2.0
/*
 * main.c - Multi purpose firmware loading support
 *
 * Copyright (c) 2003 Manuel Estrada Sainz
 *
 * Please see Documentation/firmware_class/ for more information.
 *
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/capability.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/vmalloc.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/highmem.h>
#include <linux/firmware.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/file.h>
#include <linux/list.h>
#include <linux/fs.h>
#include <linux/async.h>
#include <linux/pm.h>
#include <linux/suspend.h>
#include <linux/syscore_ops.h>
#include <linux/reboot.h>
#include <linux/security.h>

#include <generated/utsrelease.h>

#include "../base.h"
#include "firmware.h"
#include "fallback.h"

MODULE_AUTHOR("Manuel Estrada Sainz");
MODULE_DESCRIPTION("Multi purpose firmware loading support");
MODULE_LICENSE("GPL");


struct firmware_cache {
	/* firmware_buf instance will be added into the below list */
	
spinlock_t lock;
	
struct list_head head;
	
int state;

#ifdef CONFIG_PM_SLEEP
	/*
         * Names of firmware images which have been cached successfully
         * will be added into the below list so that device uncache
         * helper can trace which firmware images have been cached
         * before.
         */
	
spinlock_t name_lock;
	
struct list_head fw_names;

	
struct delayed_work work;

	
struct notifier_block   pm_notify;
#endif
};


struct fw_cache_entry {
	
struct list_head list;
	
const char *name;
};


struct fw_name_devm {
	
unsigned long magic;
	
const char *name;
};



static inline struct fw_priv *to_fw_priv(struct kref *ref)
{
	return container_of(ref, struct fw_priv, ref);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
25
100.00%
2
100.00%
Total
25
100.00%
2
100.00%


#define	FW_LOADER_NO_CACHE	0

#define	FW_LOADER_START_CACHE	1

/* fw_lock could be moved to 'struct fw_sysfs' but since it is just
 * guarding for corner cases a global lock should be OK */
DEFINE_MUTEX(fw_lock);


static struct firmware_cache fw_cache;

/* Builtin firmware support */

#ifdef CONFIG_FW_LOADER

extern struct builtin_fw __start_builtin_fw[];
extern struct builtin_fw __end_builtin_fw[];



static void fw_copy_to_prealloc_buf(struct firmware *fw,
				    void *buf, size_t size)
{
	if (!buf || size < fw->size)
		return;
	memcpy(buf, fw->data, fw->size);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
43
100.00%
1
100.00%
Total
43
100.00%
1
100.00%



static bool fw_get_builtin_firmware(struct firmware *fw, const char *name,
				    void *buf, size_t size)
{
	struct builtin_fw *b_fw;

	for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++) {
		if (strcmp(name, b_fw->name) == 0) {
			fw->size = b_fw->size;
			fw->data = b_fw->data;
			fw_copy_to_prealloc_buf(fw, buf, size);

			return true;
		}
	}

	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
42
47.19%
1
25.00%
Linus Torvalds
31
34.83%
1
25.00%
Stephen Boyd
13
14.61%
1
25.00%
Luis R. Rodriguez
3
3.37%
1
25.00%
Total
89
100.00%
4
100.00%



static bool fw_is_builtin_firmware(const struct firmware *fw)
{
	struct builtin_fw *b_fw;

	for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++)
		if (fw->data == b_fw->data)
			return true;

	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dmitry Torokhov
25
54.35%
1
33.33%
Linus Torvalds
14
30.43%
1
33.33%
Ming Lei
7
15.22%
1
33.33%
Total
46
100.00%
3
100.00%

#else /* Module case - no builtin firmware support */



static inline bool fw_get_builtin_firmware(struct firmware *fw,
					   const char *name, void *buf,
					   size_t size)
{
	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dmitry Torokhov
20
74.07%
1
50.00%
Stephen Boyd
7
25.93%
1
50.00%
Total
27
100.00%
2
100.00%



static inline bool fw_is_builtin_firmware(const struct firmware *fw)
{
	return false;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Dmitry Torokhov
16
100.00%
1
100.00%
Total
16
100.00%
1
100.00%

#endif



static void fw_state_init(struct fw_priv *fw_priv)
{
	struct fw_state *fw_st = &fw_priv->fw_st;

	init_completion(&fw_st->completion);
	fw_st->status = FW_STATUS_UNKNOWN;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Wagner
21
60.00%
1
33.33%
Luis R. Rodriguez
14
40.00%
2
66.67%
Total
35
100.00%
3
100.00%



static inline int fw_state_wait(struct fw_priv *fw_priv)
{
	return __fw_state_wait_common(fw_priv, MAX_SCHEDULE_TIMEOUT);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Wagner
11
55.00%
1
25.00%
Luis R. Rodriguez
8
40.00%
2
50.00%
Björn Andersson
1
5.00%
1
25.00%
Total
20
100.00%
4
100.00%

static int fw_cache_piggyback_on_request(const char *name);



static struct fw_priv *__allocate_fw_priv(const char *fw_name,
					  struct firmware_cache *fwc,
					  void *dbuf, size_t size)
{
	struct fw_priv *fw_priv;

	fw_priv = kzalloc(sizeof(*fw_priv), GFP_ATOMIC);
	if (!fw_priv)
		return NULL;

	fw_priv->fw_name = kstrdup_const(fw_name, GFP_ATOMIC);
	if (!fw_priv->fw_name) {
		kfree(fw_priv);
		return NULL;
	}

	kref_init(&fw_priv->ref);
	fw_priv->fwc = fwc;
	fw_priv->data = dbuf;
	fw_priv->allocated_size = size;
	fw_state_init(fw_priv);
#ifdef CONFIG_FW_LOADER_USER_HELPER
	INIT_LIST_HEAD(&fw_priv->pending_list);
#endif

	pr_debug("%s: fw-%s fw_priv=%p\n", __func__, fw_name, fw_priv);

	return fw_priv;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
122
89.05%
2
50.00%
Daniel Wagner
15
10.95%
2
50.00%
Total
137
100.00%
4
100.00%



static struct fw_priv *__lookup_fw_priv(const char *fw_name)
{
	struct fw_priv *tmp;
	struct firmware_cache *fwc = &fw_cache;

	list_for_each_entry(tmp, &fwc->head, list)
		if (!strcmp(tmp->fw_name, fw_name))
			return tmp;
	return NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
46
88.46%
3
75.00%
Daniel Wagner
6
11.54%
1
25.00%
Total
52
100.00%
4
100.00%

/* Returns 1 for batching firmware requests with the same name */


static int alloc_lookup_fw_priv(const char *fw_name,
				struct firmware_cache *fwc,
				struct fw_priv **fw_priv, void *dbuf,
				size_t size)
{
	struct fw_priv *tmp;

	spin_lock(&fwc->lock);
	tmp = __lookup_fw_priv(fw_name);
	if (tmp) {
		kref_get(&tmp->ref);
		spin_unlock(&fwc->lock);
		*fw_priv = tmp;
		pr_debug("batched request - sharing the same struct fw_priv and lookup for multiple requests\n");
		return 1;
	}
	tmp = __allocate_fw_priv(fw_name, fwc, dbuf, size);
	if (tmp)
		list_add(&tmp->list, &fwc->head);
	spin_unlock(&fwc->lock);

	*fw_priv = tmp;

	return tmp ? 0 : -ENOMEM;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
91
67.41%
5
45.45%
Stephen Boyd
22
16.30%
2
18.18%
Andrew Morton
13
9.63%
1
9.09%
Takashi Iwai
5
3.70%
1
9.09%
David Woodhouse
2
1.48%
1
9.09%
Manuel Estrada Sainz
2
1.48%
1
9.09%
Total
135
100.00%
11
100.00%



static void __free_fw_priv(struct kref *ref)
	__releases(&fwc->lock
Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
7
58.33%
1
33.33%
Manuel Estrada Sainz
3
25.00%
1
33.33%
Chuansheng Liu
2
16.67%
1
33.33%
Total
12
100.00%
3
100.00%

)
{
	struct fw_priv *fw_priv = to_fw_priv(ref);
	struct firmware_cache *fwc = fw_priv->fwc;

	pr_debug("%s: fw-%s fw_priv=%p data=%p size=%u\n",
		 __func__, fw_priv->fw_name, fw_priv, fw_priv->data,
		 (unsigned int)fw_priv->size);

	list_del(&fw_priv->list);
	spin_unlock(&fwc->lock);

#ifdef CONFIG_FW_LOADER_USER_HELPER
	if (fw_priv->is_paged_buf) {
		int i;
		vunmap(fw_priv->data);
		for (i = 0; i < fw_priv->nr_pages; i++)
			__free_page(fw_priv->pages[i]);
		vfree(fw_priv->pages);
	} else
#endif
	if (!fw_priv->allocated_size)
		vfree(fw_priv->data);
	kfree_const(fw_priv->fw_name);
	kfree(fw_priv);
}



static void free_fw_priv(struct fw_priv *fw_priv)
{
	struct firmware_cache *fwc = fw_priv->fwc;
	spin_lock(&fwc->lock);
	if (!kref_put(&fw_priv->ref, __free_fw_priv))
		spin_unlock(&fwc->lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
36
73.47%
2
50.00%
Takashi Iwai
7
14.29%
1
25.00%
Ming Lei
6
12.24%
1
25.00%
Total
49
100.00%
4
100.00%

/* direct firmware loading support */

static char fw_path_para[256];

static const char * const fw_path[] = {
	fw_path_para,
	"/lib/firmware/updates/" UTS_RELEASE,
	"/lib/firmware/updates",
	"/lib/firmware/" UTS_RELEASE,
	"/lib/firmware"
};

/*
 * Typical usage is that passing 'firmware_class.path=$CUSTOMIZED_PATH'
 * from kernel command line because firmware_class is generally built in
 * kernel instead of module.
 */
module_param_string(path, fw_path_para, sizeof(fw_path_para), 0644);
MODULE_PARM_DESC(path, "customized firmware image search path with a higher priority than default path");


static int

fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv)
{
	loff_t size;
	int i, len;
	int rc = -ENOENT;
	char *path;
	enum kernel_read_file_id id = READING_FIRMWARE;
	size_t msize = INT_MAX;

	/* Already populated data member means we're loading into a buffer */
	if (fw_priv->data) {
		id = READING_FIRMWARE_PREALLOC_BUFFER;
		msize = fw_priv->allocated_size;
	}

	path = __getname();
	if (!path)
		return -ENOMEM;

	for (i = 0; i < ARRAY_SIZE(fw_path); i++) {
		/* skip the unset customized path */
		if (!fw_path[i][0])
			continue;

		len = snprintf(path, PATH_MAX, "%s/%s",
			       fw_path[i], fw_priv->fw_name);
		if (len >= PATH_MAX) {
			rc = -ENAMETOOLONG;
			break;
		}

		fw_priv->size = 0;
		rc = kernel_read_file_from_path(path, &fw_priv->data, &size,
						msize, id);
		if (rc) {
			if (rc == -ENOENT)
				dev_dbg(device, "loading %s failed with error %d\n",
					 path, rc);
			else
				dev_warn(device, "loading %s failed with error %d\n",
					 path, rc);
			continue;
		}
		dev_dbg(device, "direct-loading %s\n", fw_priv->fw_name);
		fw_priv->size = size;
		fw_state_done(fw_priv);
		break;
	}
	__putname(path);

	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
168
71.19%
2
33.33%
Takashi Iwai
40
16.95%
1
16.67%
Stephen Boyd
17
7.20%
2
33.33%
Ming Lei
11
4.66%
1
16.67%
Total
236
100.00%
6
100.00%

/* firmware holds the ownership of pages */


static void firmware_free_data(const struct firmware *fw)
{
	/* Loaded directly? */
	if (!fw->priv) {
		vfree(fw->data);
		return;
	}
	free_fw_priv(fw->priv);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
30
81.08%
1
50.00%
Takashi Iwai
7
18.92%
1
50.00%
Total
37
100.00%
2
100.00%

/* store the pages buffer info firmware from buf */


static void fw_set_page_data(struct fw_priv *fw_priv, struct firmware *fw)
{
	fw->priv = fw_priv;
#ifdef CONFIG_FW_LOADER_USER_HELPER
	fw->pages = fw_priv->pages;
#endif
	fw->size = fw_priv->size;
	fw->data = fw_priv->data;

	pr_debug("%s: fw-%s fw_priv=%p data=%p size=%u\n",
		 __func__, fw_priv->fw_name, fw_priv, fw_priv->data,
		 (unsigned int)fw_priv->size);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
48
63.16%
1
20.00%
Takashi Iwai
18
23.68%
2
40.00%
Ming Lei
10
13.16%
2
40.00%
Total
76
100.00%
5
100.00%

#ifdef CONFIG_PM_SLEEP


static void fw_name_devm_release(struct device *dev, void *res)
{
	struct fw_name_devm *fwn = res;

	if (fwn->magic == (unsigned long)&fw_cache)
		pr_debug("%s: fw_name-%s devm-%p released\n",
				__func__, fwn->name, res);
	kfree_const(fwn->name);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
27
49.09%
1
12.50%
Takashi Iwai
15
27.27%
2
25.00%
Ming Lei
10
18.18%
3
37.50%
Stephen Boyd
2
3.64%
1
12.50%
Maxime Bizon
1
1.82%
1
12.50%
Total
55
100.00%
8
100.00%



static int fw_devm_match(struct device *dev, void *res,
		void *match_data)
{
	struct fw_name_devm *fwn = res;

	return (fwn->magic == (unsigned long)&fw_cache) &&
		!strcmp(fwn->name, match_data);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
43
86.00%
2
33.33%
Takashi Iwai
4
8.00%
2
33.33%
Stephen Boyd
2
4.00%
1
16.67%
zhang jun
1
2.00%
1
16.67%
Total
50
100.00%
6
100.00%



static struct fw_name_devm *fw_find_devm_name(struct device *dev,
		const char *name)
{
	struct fw_name_devm *fwn;

	fwn = devres_find(dev, fw_name_devm_release,
			  fw_devm_match, (void *)name);
	return fwn;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
30
69.77%
2
40.00%
Manuel Estrada Sainz
11
25.58%
1
20.00%
Ming Lei
1
2.33%
1
20.00%
Andrew Morton
1
2.33%
1
20.00%
Total
43
100.00%
5
100.00%



static bool fw_cache_is_setup(struct device *dev, const char *name)
{
	struct fw_name_devm *fwn;

	fwn = fw_find_devm_name(dev, name);
	if (fwn)
		return true;

	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
40
100.00%
3
100.00%
Total
40
100.00%
3
100.00%

/* add firmware name into devres list */


static int fw_add_devm_name(struct device *dev, const char *name)
{
	struct fw_name_devm *fwn;

	if (fw_cache_is_setup(dev, name))
		return 0;

	fwn = devres_alloc(fw_name_devm_release, sizeof(struct fw_name_devm),
			   GFP_KERNEL);
	if (!fwn)
		return -ENOMEM;
	fwn->name = kstrdup_const(name, GFP_KERNEL);
	if (!fwn->name) {
		devres_free(fwn);
		return -ENOMEM;
	}

	fwn->magic = (unsigned long)&fw_cache;
	devres_add(dev, fwn);

	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
92
85.98%
5
38.46%
Andrew Morton
3
2.80%
1
7.69%
David Woodhouse
3
2.80%
1
7.69%
Takashi Iwai
3
2.80%
2
15.38%
Stephen Boyd
2
1.87%
1
7.69%
Ming Lei
2
1.87%
1
7.69%
Manuel Estrada Sainz
1
0.93%
1
7.69%
Björn Helgaas
1
0.93%
1
7.69%
Total
107
100.00%
13
100.00%

#else


static bool fw_cache_is_setup(struct device *dev, const char *name)
{
	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
19
100.00%
1
100.00%
Total
19
100.00%
1
100.00%



static int fw_add_devm_name(struct device *dev, const char *name)
{
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
19
100.00%
2
100.00%
Total
19
100.00%
2
100.00%

#endif



int assign_fw(struct firmware *fw, struct device *device,
	      unsigned int opt_flags)
{
	struct fw_priv *fw_priv = fw->priv;
	int ret;

	mutex_lock(&fw_lock);
	if (!fw_priv->size || fw_state_is_aborted(fw_priv)) {
		mutex_unlock(&fw_lock);
		return -ENOENT;
	}

	/*
         * add firmware name into devres list so that we can auto cache
         * and uncache firmware for device.
         *
         * device may has been deleted already, but the problem
         * should be fixed in devres or driver core.
         */
	/* don't cache firmware handled without uevent */
	if (device && (opt_flags & FW_OPT_UEVENT) &&
	    !(opt_flags & FW_OPT_NOCACHE)) {
		ret = fw_add_devm_name(device, fw_priv->fw_name);
		if (ret) {
			mutex_unlock(&fw_lock);
			return ret;
		}
	}

	/*
         * After caching firmware image is started, let it piggyback
         * on request firmware.
         */
	if (!(opt_flags & FW_OPT_NOCACHE) &&
	    fw_priv->fwc->state == FW_LOADER_START_CACHE) {
		if (fw_cache_piggyback_on_request(fw_priv->fw_name))
			kref_get(&fw_priv->ref);
	}

	/* pass the pages buffer to driver at the last minute */
	fw_set_page_data(fw_priv, fw);
	mutex_unlock(&fw_lock);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
143
88.27%
4
57.14%
Takashi Iwai
19
11.73%
3
42.86%
Total
162
100.00%
7
100.00%

/* prepare firmware and firmware_buf structs;
 * return 0 if a firmware is already assigned, 1 if need to load one,
 * or a negative error code
 */

static int

_request_firmware_prepare(struct firmware **firmware_p, const char *name,
			  struct device *device, void *dbuf, size_t size)
{
	struct firmware *firmware;
	struct fw_priv *fw_priv;
	int ret;

	*firmware_p = firmware = kzalloc(sizeof(*firmware), GFP_KERNEL);
	if (!firmware) {
		dev_err(device, "%s: kmalloc(struct firmware) failed\n",
			__func__);
		return -ENOMEM;
	}

	if (fw_get_builtin_firmware(firmware, name, dbuf, size)) {
		dev_dbg(device, "using built-in %s\n", name);
		return 0; /* assigned */
	}

	ret = alloc_lookup_fw_priv(name, &fw_cache, &fw_priv, dbuf, size);

	/*
         * bind with 'priv' now to avoid warning in failure path
         * of requesting firmware.
         */
	firmware->priv = fw_priv;

	if (ret > 0) {
		ret = fw_state_wait(fw_priv);
		if (!ret) {
			fw_set_page_data(fw_priv, firmware);
			return 0; /* assigned */
		}
	}

	if (ret < 0)
		return ret;
	return 1; /* need to load */
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Takashi Iwai
93
52.84%
2
10.53%
Stephen Boyd
35
19.89%
2
10.53%
Rafael J. Wysocki
9
5.11%
1
5.26%
Luis R. Rodriguez
9
5.11%
2
10.53%
Andrew Morton
8
4.55%
3
15.79%
Ming Lei
7
3.98%
3
15.79%
Manuel Estrada Sainz
6
3.41%
1
5.26%
Abhay Salunke
3
1.70%
1
5.26%
David Woodhouse
2
1.14%
1
5.26%
Dmitry Torokhov
2
1.14%
1
5.26%
Greg Kroah-Hartman
1
0.57%
1
5.26%
Daniel Wagner
1
0.57%
1
5.26%
Total
176
100.00%
19
100.00%

/*
 * Batched requests need only one wake, we need to do this step last due to the
 * fallback mechanism. The buf is protected with kref_get(), and it won't be
 * released until the last user calls release_firmware().
 *
 * Failed batched requests are possible as well, in such cases we just share
 * the struct fw_priv and won't release it until all requests are woken
 * and have gone through this same path.
 */


static void fw_abort_batch_reqs(struct firmware *fw)
{
	struct fw_priv *fw_priv;

	/* Loaded directly? */
	if (!fw || !fw->priv)
		return;

	fw_priv = fw->priv;
	if (!fw_state_is_aborted(fw_priv))
		fw_state_aborted(fw_priv);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
47
100.00%
2
100.00%
Total
47
100.00%
2
100.00%

/* called from request_firmware() and request_firmware_work_func() */

static int

_request_firmware(const struct firmware **firmware_p, const char *name,
		  struct device *device, void *buf, size_t size,
		  unsigned int opt_flags)
{
	struct firmware *fw = NULL;
	int ret;

	if (!firmware_p)
		return -EINVAL;

	if (!name || name[0] == '\0') {
		ret = -EINVAL;
		goto out;
	}

	ret = _request_firmware_prepare(&fw, name, device, buf, size);
	if (ret <= 0) /* error or already assigned */
		goto out;

	ret = fw_get_filesystem_firmware(device, fw->priv);
	if (ret) {
		if (!(opt_flags & FW_OPT_NO_WARN))
			dev_warn(device,
				 "Direct firmware load for %s failed with error %d\n",
				 name, ret);
		ret = fw_sysfs_fallback(fw, name, device, opt_flags, ret);
	} else
		ret = assign_fw(fw, device, opt_flags);

 out:
	if (ret < 0) {
		fw_abort_batch_reqs(fw);
		release_firmware(fw);
		fw = NULL;
	}

	*firmware_p = fw;
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Takashi Iwai
74
37.56%
3
16.67%
Rafael J. Wysocki
26
13.20%
2
11.11%
Abhay Salunke
25
12.69%
1
5.56%
Luis R. Rodriguez
17
8.63%
5
27.78%
Kees Cook
16
8.12%
1
5.56%
Neil Horman
14
7.11%
1
5.56%
Stephen Boyd
13
6.60%
2
11.11%
Brian Norris
10
5.08%
1
5.56%
Ming Lei
1
0.51%
1
5.56%
Johannes Berg
1
0.51%
1
5.56%
Total
197
100.00%
18
100.00%

/**
 * request_firmware: - send firmware request and wait for it
 * @firmware_p: pointer to firmware image
 * @name: name of firmware file
 * @device: device for which firmware is being loaded
 *
 *      @firmware_p will be used to return a firmware image by the name
 *      of @name for device @device.
 *
 *      Should be called from user context where sleeping is allowed.
 *
 *      @name will be used as $FIRMWARE in the uevent environment and
 *      should be distinctive enough not to be confused with any other
 *      firmware image for this or any other device.
 *
 *      Caller must hold the reference count of @device.
 *
 *      The function can be called safely inside device's suspend and
 *      resume callback.
 **/

int

request_firmware(const struct firmware **firmware_p, const char *name,
		 struct device *device)
{
	int ret;

	/* Need to pin this module until return */
	__module_get(THIS_MODULE);
	ret = _request_firmware(firmware_p, name, device, NULL, 0,
				FW_OPT_UEVENT);
	module_put(THIS_MODULE);
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Takashi Iwai
33
58.93%
2
50.00%
Ming Lei
19
33.93%
1
25.00%
Stephen Boyd
4
7.14%
1
25.00%
Total
56
100.00%
4
100.00%

EXPORT_SYMBOL(request_firmware);

/**
 * request_firmware_direct: - load firmware directly without usermode helper
 * @firmware_p: pointer to firmware image
 * @name: name of firmware file
 * @device: device for which firmware is being loaded
 *
 * This function works pretty much like request_firmware(), but this doesn't
 * fall back to usermode helper even if the firmware couldn't be loaded
 * directly from fs.  Hence it's useful for loading optional firmwares, which
 * aren't always present, without extra long timeouts of udev.
 **/


int request_firmware_direct(const struct firmware **firmware_p,
			    const char *name, struct device *device)
{
	int ret;

	__module_get(THIS_MODULE);
	ret = _request_firmware(firmware_p, name, device, NULL, 0,
				FW_OPT_UEVENT | FW_OPT_NO_WARN |
				FW_OPT_NOFALLBACK);
	module_put(THIS_MODULE);
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Takashi Iwai
51
86.44%
2
40.00%
Stephen Boyd
4
6.78%
1
20.00%
Luis R. Rodriguez
4
6.78%
2
40.00%
Total
59
100.00%
5
100.00%

EXPORT_SYMBOL_GPL(request_firmware_direct);

/**
 * firmware_request_cache: - cache firmware for suspend so resume can use it
 * @name: name of firmware file
 * @device: device for which firmware should be cached for
 *
 * There are some devices with an optimization that enables the device to not
 * require loading firmware on system reboot. This optimization may still
 * require the firmware present on resume from suspend. This routine can be
 * used to ensure the firmware is present on resume from suspend in these
 * situations. This helper is not compatible with drivers which use
 * request_firmware_into_buf() or request_firmware_nowait() with no uevent set.
 **/


int firmware_request_cache(struct device *device, const char *name)
{
	int ret;

	mutex_lock(&fw_lock);
	ret = fw_add_devm_name(device, name);
	mutex_unlock(&fw_lock);

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
42
100.00%
1
100.00%
Total
42
100.00%
1
100.00%

EXPORT_SYMBOL_GPL(firmware_request_cache);

/**
 * request_firmware_into_buf - load firmware into a previously allocated buffer
 * @firmware_p: pointer to firmware image
 * @name: name of firmware file
 * @device: device for which firmware is being loaded and DMA region allocated
 * @buf: address of buffer to load firmware into
 * @size: size of buffer
 *
 * This function works pretty much like request_firmware(), but it doesn't
 * allocate a buffer to hold the firmware data. Instead, the firmware
 * is loaded directly into the buffer pointed to by @buf and the @firmware_p
 * data member is pointed at @buf.
 *
 * This function doesn't cache firmware either.
 */

int

request_firmware_into_buf(const struct firmware **firmware_p, const char *name,
			  struct device *device, void *buf, size_t size)
{
	int ret;

	if (fw_cache_is_setup(device, name))
		return -EOPNOTSUPP;

	__module_get(THIS_MODULE);
	ret = _request_firmware(firmware_p, name, device, buf, size,
				FW_OPT_UEVENT | FW_OPT_NOCACHE);
	module_put(THIS_MODULE);
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen Boyd
64
83.12%
1
50.00%
Luis R. Rodriguez
13
16.88%
1
50.00%
Total
77
100.00%
2
100.00%

EXPORT_SYMBOL(request_firmware_into_buf);

/**
 * release_firmware: - release the resource associated with a firmware image
 * @fw: firmware resource to release
 **/


void release_firmware(const struct firmware *fw)
{
	if (fw) {
		if (!fw_is_builtin_firmware(fw))
			firmware_free_data(fw);
		kfree(fw);
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Manuel Estrada Sainz
25
71.43%
1
25.00%
Dmitry Torokhov
5
14.29%
1
25.00%
David Woodhouse
5
14.29%
2
50.00%
Total
35
100.00%
4
100.00%

EXPORT_SYMBOL(release_firmware);

/* Async support */

struct firmware_work {
	
struct work_struct work;
	
struct module *module;
	
const char *name;
	
struct device *device;
	
void *context;
	
void (*cont)(const struct firmware *fw, void *context);
	
unsigned int opt_flags;
};



static void request_firmware_work_func(struct work_struct *work)
{
	struct firmware_work *fw_work;
	const struct firmware *fw;

	fw_work = container_of(work, struct firmware_work, work);

	_request_firmware(&fw, fw_work->name, fw_work->device, NULL, 0,
			  fw_work->opt_flags);
	fw_work->cont(fw, fw_work->context);
	put_device(fw_work->device); /* taken in request_firmware_nowait() */

	module_put(fw_work->module);
	kfree_const(fw_work->name);
	kfree(fw_work);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Manuel Estrada Sainz
52
55.32%
1
10.00%
Stephen Boyd
20
21.28%
3
30.00%
Luis R. Rodriguez
7
7.45%
1
10.00%
Ming Lei
7
7.45%
1
10.00%
Takashi Iwai
3
3.19%
2
20.00%
Andrew Morton
3
3.19%
1
10.00%
Rafael J. Wysocki
2
2.13%
1
10.00%
Total
94
100.00%
10
100.00%

/**
 * request_firmware_nowait - asynchronous version of request_firmware
 * @module: module requesting the firmware
 * @uevent: sends uevent to copy the firmware image if this flag
 *      is non-zero else the firmware copy must be done manually.
 * @name: name of firmware file
 * @device: device for which firmware is being loaded
 * @gfp: allocation flags
 * @context: will be passed over to @cont, and
 *      @fw may be %NULL if firmware request fails.
 * @cont: function will be called asynchronously when the firmware
 *      request is over.
 *
 *      Caller must hold the reference count of @device.
 *
 *      Asynchronous variant of request_firmware() for user contexts:
 *              - sleep for as small periods as possible since it may
 *                increase kernel boot time of built-in device drivers
 *                requesting firmware in their ->probe() methods, if
 *                @gfp is GFP_KERNEL.
 *
 *              - can't sleep at all if @gfp is GFP_ATOMIC.
 **/

int

request_firmware_nowait(
	struct module *module, bool uevent,
	const char *name, struct device *device, gfp_t gfp, void *context,
	void (*cont)(const struct firmware *fw, void *context))
{
	struct firmware_work *fw_work;

	fw_work = kzalloc(sizeof(struct firmware_work), gfp);
	if (!fw_work)
		return -ENOMEM;

	fw_work->module = module;
	fw_work->name = kstrdup_const(name, gfp);
	if (!fw_work->name) {
		kfree(fw_work);
		return -ENOMEM;
	}
	fw_work->device = device;
	fw_work->context = context;
	fw_work->cont = cont;
	fw_work->opt_flags = FW_OPT_NOWAIT |
		(uevent ? FW_OPT_UEVENT : FW_OPT_USERHELPER);

	if (!uevent && fw_cache_is_setup(device, name)) {
		kfree_const(fw_work->name);
		kfree(fw_work);
		return -EOPNOTSUPP;
	}

	if (!try_module_get(module)) {
		kfree_const(fw_work->name);
		kfree(fw_work);
		return -EFAULT;
	}

	get_device(fw_work->device);
	INIT_WORK(&fw_work->work, request_firmware_work_func);
	schedule_work(&fw_work->work);
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Manuel Estrada Sainz
85
37.78%
1
6.67%
Luis R. Rodriguez
60
26.67%
3
20.00%
Dmitry Torokhov
40
17.78%
1
6.67%
Takashi Iwai
9
4.00%
2
13.33%
Ming Lei
7
3.11%
1
6.67%
Stephen Boyd
7
3.11%
1
6.67%
Matthieu Castet
5
2.22%
1
6.67%
Johannes Berg
4
1.78%
1
6.67%
Andrew Morton
3
1.33%
1
6.67%
Abhay Salunke
2
0.89%
1
6.67%
Kay Sievers
2
0.89%
1
6.67%
Bob Liu
1
0.44%
1
6.67%
Total
225
100.00%
15
100.00%

EXPORT_SYMBOL(request_firmware_nowait);

#ifdef CONFIG_PM_SLEEP
static ASYNC_DOMAIN_EXCLUSIVE(fw_cache_domain);

/**
 * cache_firmware - cache one firmware image in kernel memory space
 * @fw_name: the firmware image name
 *
 * Cache firmware in kernel memory so that drivers can use it when
 * system isn't ready for them to request firmware image from userspace.
 * Once it returns successfully, driver can use request_firmware or its
 * nowait version to get the cached firmware without any interacting
 * with userspace
 *
 * Return 0 if the firmware image has been cached successfully
 * Return !0 otherwise
 *
 */


static int cache_firmware(const char *fw_name)
{
	int ret;
	const struct firmware *fw;

	pr_debug("%s: %s\n", __func__, fw_name);

	ret = request_firmware(&fw, fw_name, NULL);
	if (!ret)
		kfree(fw);

	pr_debug("%s: %s ret=%d\n", __func__, fw_name, ret);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
65
100.00%
2
100.00%
Total
65
100.00%
2
100.00%



static struct fw_priv *lookup_fw_priv(const char *fw_name)
{
	struct fw_priv *tmp;
	struct firmware_cache *fwc = &fw_cache;

	spin_lock(&fwc->lock);
	tmp = __lookup_fw_priv(fw_name);
	spin_unlock(&fwc->lock);

	return tmp;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
48
92.31%
1
50.00%
Luis R. Rodriguez
4
7.69%
1
50.00%
Total
52
100.00%
2
100.00%

/**
 * uncache_firmware - remove one cached firmware image
 * @fw_name: the firmware image name
 *
 * Uncache one firmware image which has been cached successfully
 * before.
 *
 * Return 0 if the firmware cache has been removed successfully
 * Return !0 otherwise
 *
 */


static int uncache_firmware(const char *fw_name)
{
	struct fw_priv *fw_priv;
	struct firmware fw;

	pr_debug("%s: %s\n", __func__, fw_name);

	if (fw_get_builtin_firmware(&fw, fw_name, NULL, 0))
		return 0;

	fw_priv = lookup_fw_priv(fw_name);
	if (fw_priv) {
		free_fw_priv(fw_priv);
		return 0;
	}

	return -EINVAL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
60
84.51%
2
50.00%
Luis R. Rodriguez
7
9.86%
1
25.00%
Stephen Boyd
4
5.63%
1
25.00%
Total
71
100.00%
4
100.00%



static struct fw_cache_entry *alloc_fw_cache_entry(const char *name)
{
	struct fw_cache_entry *fce;

	fce = kzalloc(sizeof(*fce), GFP_ATOMIC);
	if (!fce)
		goto exit;

	fce->name = kstrdup_const(name, GFP_ATOMIC);
	if (!fce->name) {
		kfree(fce);
		fce = NULL;
		goto exit;
	}
exit:
	return fce;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
51
67.11%
1
50.00%
Luis R. Rodriguez
25
32.89%
1
50.00%
Total
76
100.00%
2
100.00%



static int __fw_entry_found(const char *name)
{
	struct firmware_cache *fwc = &fw_cache;
	struct fw_cache_entry *fce;

	list_for_each_entry(fce, &fwc->fw_names, list) {
		if (!strcmp(fce->name, name))
			return 1;
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
52
100.00%
2
100.00%
Total
52
100.00%
2
100.00%



static int fw_cache_piggyback_on_request(const char *name)
{
	struct firmware_cache *fwc = &fw_cache;
	struct fw_cache_entry *fce;
	int ret = 0;

	spin_lock(&fwc->name_lock);
	if (__fw_entry_found(name))
		goto found;

	fce = alloc_fw_cache_entry(name);
	if (fce) {
		ret = 1;
		list_add(&fce->list, &fwc->fw_names);
		pr_debug("%s: fw: %s\n", __func__, name);
	}
found:
	spin_unlock(&fwc->name_lock);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
99
100.00%
2
100.00%
Total
99
100.00%
2
100.00%



static void free_fw_cache_entry(struct fw_cache_entry *fce)
{
	kfree_const(fce->name);
	kfree(fce);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
16
69.57%
1
50.00%
Luis R. Rodriguez
7
30.43%
1
50.00%
Total
23
100.00%
2
100.00%



static void __async_dev_cache_fw_image(void *fw_entry,
				       async_cookie_t cookie)
{
	struct fw_cache_entry *fce = fw_entry;
	struct firmware_cache *fwc = &fw_cache;
	int ret;

	ret = cache_firmware(fce->name);
	if (ret) {
		spin_lock(&fwc->name_lock);
		list_del(&fce->list);
		spin_unlock(&fwc->name_lock);

		free_fw_cache_entry(fce);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
75
100.00%
2
100.00%
Total
75
100.00%
2
100.00%

/* called with dev->devres_lock held */


static void dev_create_fw_entry(struct device *dev, void *res,
				void *data)
{
	struct fw_name_devm *fwn = res;
	const char *fw_name = fwn->name;
	struct list_head *head = data;
	struct fw_cache_entry *fce;

	fce = alloc_fw_cache_entry(fw_name);
	if (fce)
		list_add(&fce->list, head);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
68
100.00%
1
100.00%
Total
68
100.00%
1
100.00%



static int devm_name_match(struct device *dev, void *res,
			   void *match_data)
{
	struct fw_name_devm *fwn = res;
	return (fwn->magic == (unsigned long)match_data);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
39
100.00%
1
100.00%
Total
39
100.00%
1
100.00%



static void dev_cache_fw_image(struct device *dev, void *data)
{
	LIST_HEAD(todo);
	struct fw_cache_entry *fce;
	struct fw_cache_entry *fce_next;
	struct firmware_cache *fwc = &fw_cache;

	devres_for_each_res(dev, fw_name_devm_release,
			    devm_name_match, &fw_cache,
			    dev_create_fw_entry, &todo);

	list_for_each_entry_safe(fce, fce_next, &todo, list) {
		list_del(&fce->list);

		spin_lock(&fwc->name_lock);
		/* only one cache entry for one firmware */
		if (!__fw_entry_found(fce->name)) {
			list_add(&fce->list, &fwc->fw_names);
		} else {
			free_fw_cache_entry(fce);
			fce = NULL;
		}
		spin_unlock(&fwc->name_lock);

		if (fce)
			async_schedule_domain(__async_dev_cache_fw_image,
					      (void *)fce,
					      &fw_cache_domain);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
147
100.00%
5
100.00%
Total
147
100.00%
5
100.00%



static void __device_uncache_fw_images(void)
{
	struct firmware_cache *fwc = &fw_cache;
	struct fw_cache_entry *fce;

	spin_lock(&fwc->name_lock);
	while (!list_empty(&fwc->fw_names)) {
		fce = list_entry(fwc->fw_names.next,
				struct fw_cache_entry, list);
		list_del(&fce->list);
		spin_unlock(&fwc->name_lock);

		uncache_firmware(fce->name);
		free_fw_cache_entry(fce);

		spin_lock(&fwc->name_lock);
	}
	spin_unlock(&fwc->name_lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
102
100.00%
1
100.00%
Total
102
100.00%
1
100.00%

/**
 * device_cache_fw_images - cache devices' firmware
 *
 * If one device called request_firmware or its nowait version
 * successfully before, the firmware names are recored into the
 * device's devres link list, so device_cache_fw_images can call
 * cache_firmware() to cache these firmwares for the device,
 * then the device driver can load its firmwares easily at
 * time when system is not ready to complete loading firmware.
 */


static void device_cache_fw_images(void)
{
	struct firmware_cache *fwc = &fw_cache;
	DEFINE_WAIT(wait);

	pr_debug("%s\n", __func__);

	/* cancel uncache work */
	cancel_delayed_work_sync(&fwc->work);

	fw_fallback_set_cache_timeout();

	mutex_lock(&fw_lock);
	fwc->state = FW_LOADER_START_CACHE;
	dpm_for_each_dev(NULL, dev_cache_fw_image);
	mutex_unlock(&fw_lock);

	/* wait for completion of caching firmware for all devices */
	async_synchronize_full_domain(&fw_cache_domain);

	fw_fallback_set_default_timeout();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
71
94.67%
6
85.71%
Luis R. Rodriguez
4
5.33%
1
14.29%
Total
75
100.00%
7
100.00%

/**
 * device_uncache_fw_images - uncache devices' firmware
 *
 * uncache all firmwares which have been cached successfully
 * by device_uncache_fw_images earlier
 */


static void device_uncache_fw_images(void)
{
	pr_debug("%s\n", __func__);
	__device_uncache_fw_images();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
18
100.00%
1
100.00%
Total
18
100.00%
1
100.00%



static void device_uncache_fw_images_work(struct work_struct *work)
{
	device_uncache_fw_images();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
14
100.00%
1
100.00%
Total
14
100.00%
1
100.00%

/**
 * device_uncache_fw_images_delay - uncache devices firmwares
 * @delay: number of milliseconds to delay uncache device firmwares
 *
 * uncache all devices's firmwares which has been cached successfully
 * by device_cache_fw_images after @delay milliseconds.
 */


static void device_uncache_fw_images_delay(unsigned long delay)
{
	queue_delayed_work(system_power_efficient_wq, &fw_cache.work,
			   msecs_to_jiffies(delay));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
22
88.00%
1
50.00%
Shaibal Dutta
3
12.00%
1
50.00%
Total
25
100.00%
2
100.00%



static int fw_pm_notify(struct notifier_block *notify_block,
			unsigned long mode, void *unused)
{
	switch (mode) {
	case PM_HIBERNATION_PREPARE:
	case PM_SUSPEND_PREPARE:
	case PM_RESTORE_PREPARE:
		/*
                 * kill pending fallback requests with a custom fallback
                 * to avoid stalling suspend.
                 */
		kill_pending_fw_fallback_reqs(true);
		device_cache_fw_images();
		break;

	case PM_POST_SUSPEND:
	case PM_POST_HIBERNATION:
	case PM_POST_RESTORE:
		/*
                 * In case that system sleep failed and syscore_suspend is
                 * not called.
                 */
		mutex_lock(&fw_lock);
		fw_cache.state = FW_LOADER_NO_CACHE;
		mutex_unlock(&fw_lock);

		device_uncache_fw_images_delay(10 * MSEC_PER_SEC);
		break;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
75
90.36%
3
60.00%
Luis R. Rodriguez
5
6.02%
1
20.00%
Sebastian Capella
3
3.61%
1
20.00%
Total
83
100.00%
5
100.00%

/* stop caching firmware once syscore_suspend is reached */


static int fw_suspend(void)
{
	fw_cache.state = FW_LOADER_NO_CACHE;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
17
100.00%
1
100.00%
Total
17
100.00%
1
100.00%


static struct syscore_ops fw_syscore_ops = {
	.suspend = fw_suspend,
};



static int __init register_fw_pm_ops(void)
{
	int ret;

	spin_lock_init(&fw_cache.name_lock);
	INIT_LIST_HEAD(&fw_cache.fw_names);

	INIT_DELAYED_WORK(&fw_cache.work,
			  device_uncache_fw_images_work);

	fw_cache.pm_notify.notifier_call = fw_pm_notify;
	ret = register_pm_notifier(&fw_cache.pm_notify);
	if (ret)
		return ret;

	register_syscore_ops(&fw_syscore_ops);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
72
100.00%
1
100.00%
Total
72
100.00%
1
100.00%



static inline void unregister_fw_pm_ops(void)
{
	unregister_syscore_ops(&fw_syscore_ops);
	unregister_pm_notifier(&fw_cache.pm_notify);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
23
100.00%
1
100.00%
Total
23
100.00%
1
100.00%

#else


static int fw_cache_piggyback_on_request(const char *name)
{
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
14
100.00%
1
100.00%
Total
14
100.00%
1
100.00%



static inline int register_fw_pm_ops(void)
{
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
12
100.00%
1
100.00%
Total
12
100.00%
1
100.00%



static inline void unregister_fw_pm_ops(void)
{
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
8
100.00%
1
100.00%
Total
8
100.00%
1
100.00%

#endif



static void __init fw_cache_init(void)
{
	spin_lock_init(&fw_cache.lock);
	INIT_LIST_HEAD(&fw_cache.head);
	fw_cache.state = FW_LOADER_NO_CACHE;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ming Lei
31
100.00%
2
100.00%
Total
31
100.00%
2
100.00%



static int fw_shutdown_notify(struct notifier_block *unused1,
			      unsigned long unused2, void *unused3)
{
	/*
         * Kill all pending fallback requests to avoid both stalling shutdown,
         * and avoid a deadlock with the usermode_lock.
         */
	kill_pending_fw_fallback_reqs(false);

	return NOTIFY_DONE;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
28
100.00%
1
100.00%
Total
28
100.00%
1
100.00%


static struct notifier_block fw_shutdown_nb = {
	.notifier_call = fw_shutdown_notify,
};



static int __init firmware_class_init(void)
{
	int ret;

	/* No need to unfold these on exit */
	fw_cache_init();

	ret = register_fw_pm_ops();
	if (ret)
		return ret;

	ret = register_reboot_notifier(&fw_shutdown_nb);
	if (ret)
		goto out;

	return register_sysfs_loader();

out:
	unregister_fw_pm_ops();
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
35
63.64%
3
37.50%
Manuel Estrada Sainz
9
16.36%
1
12.50%
Takashi Iwai
7
12.73%
2
25.00%
Ming Lei
3
5.45%
1
12.50%
Andrew Morton
1
1.82%
1
12.50%
Total
55
100.00%
8
100.00%



static void __exit firmware_class_exit(void)
{
	unregister_fw_pm_ops();
	unregister_reboot_notifier(&fw_shutdown_nb);
	unregister_sysfs_loader();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Manuel Estrada Sainz
10
47.62%
1
20.00%
Takashi Iwai
6
28.57%
1
20.00%
Luis R. Rodriguez
4
19.05%
2
40.00%
Ming Lei
1
4.76%
1
20.00%
Total
21
100.00%
5
100.00%

fs_initcall(firmware_class_init);
module_exit(firmware_class_exit);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Luis R. Rodriguez
1781
39.81%
31
26.50%
Ming Lei
1292
28.88%
21
17.95%
Takashi Iwai
414
9.25%
8
6.84%
Manuel Estrada Sainz
303
6.77%
2
1.71%
Stephen Boyd
226
5.05%
4
3.42%
Dmitry Torokhov
115
2.57%
2
1.71%
Daniel Wagner
56
1.25%
4
3.42%
Linus Torvalds
55
1.23%
1
0.85%
Andrew Morton
39
0.87%
6
5.13%
Rafael J. Wysocki
37
0.83%
2
1.71%
Abhay Salunke
31
0.69%
1
0.85%
Kees Cook
19
0.42%
2
1.71%
Daniel Mack
15
0.34%
1
0.85%
David Woodhouse
15
0.34%
3
2.56%
Neil Horman
14
0.31%
1
0.85%
Brian Norris
10
0.22%
1
0.85%
Chuansheng Liu
7
0.16%
1
0.85%
Johannes Berg
5
0.11%
2
1.71%
Matthieu Castet
5
0.11%
1
0.85%
Randy Dunlap
4
0.09%
2
1.71%
Sebastian Capella
3
0.07%
1
0.85%
Shaibal Dutta
3
0.07%
1
0.85%
Tejun Heo
3
0.07%
1
0.85%
Mimi Zohar
3
0.07%
1
0.85%
Kay Sievers
3
0.07%
2
1.71%
Sukadev Bhattiprolu
2
0.04%
1
0.85%
Greg Kroah-Hartman
2
0.04%
2
1.71%
Björn Andersson
1
0.02%
1
0.85%
Maxime Bizon
1
0.02%
1
0.85%
Chen Feng
1
0.02%
1
0.85%
Laura Garcia Liebana
1
0.02%
1
0.85%
Björn Helgaas
1
0.02%
1
0.85%
Markus Rechberger
1
0.02%
1
0.85%
Christoph Hellwig
1
0.02%
1
0.85%
zhang jun
1
0.02%
1
0.85%
David Shaohua Li
1
0.02%
1
0.85%
Bob Liu
1
0.02%
1
0.85%
Silvio Fricke
1
0.02%
1
0.85%
Borislav Petkov
1
0.02%
1
0.85%
Total
4474
100.00%
117
100.00%
Directory: drivers/base/firmware_loader

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.