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Release 4.14 net/wimax/op-reset.c

Directory: net/wimax
 * Linux WiMAX
 * Implement and export a method for resetting a WiMAX device
 * Copyright (C) 2008 Intel Corporation <>
 * Inaky Perez-Gonzalez <>
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 * This implements a simple synchronous call to reset a WiMAX device.
 * Resets aim at being warm, keeping the device handles active;
 * however, when that fails, it falls back to a cold reset (that will
 * disconnect and reconnect the device).

#include <net/wimax.h>
#include <net/genetlink.h>
#include <linux/wimax.h>
#include <linux/security.h>
#include <linux/export.h>
#include "wimax-internal.h"

#define D_SUBMODULE op_reset
#include "debug-levels.h"

 * wimax_reset - Reset a WiMAX device
 * @wimax_dev: WiMAX device descriptor
 * Returns:
 * %0 if ok and a warm reset was done (the device still exists in
 * the system).
 * -%ENODEV if a cold/bus reset had to be done (device has
 * disconnected and reconnected, so current handle is not valid
 * any more).
 * -%EINVAL if the device is not even registered.
 * Any other negative error code shall be considered as
 * non-recoverable.
 * Description:
 * Called when wanting to reset the device for any reason. Device is
 * taken back to power on status.
 * This call blocks; on successful return, the device has completed the
 * reset process and is ready to operate.

int wimax_reset(struct wimax_dev *wimax_dev) { int result = -EINVAL; struct device *dev = wimax_dev_to_dev(wimax_dev); enum wimax_st state; might_sleep(); d_fnstart(3, dev, "(wimax_dev %p)\n", wimax_dev); mutex_lock(&wimax_dev->mutex); dev_hold(wimax_dev->net_dev); state = wimax_dev->state; mutex_unlock(&wimax_dev->mutex); if (state >= WIMAX_ST_DOWN) { mutex_lock(&wimax_dev->mutex_reset); result = wimax_dev->op_reset(wimax_dev); mutex_unlock(&wimax_dev->mutex_reset); } dev_put(wimax_dev->net_dev); d_fnend(3, dev, "(wimax_dev %p) = %d\n", wimax_dev, result); return result; }


Iñaky Pérez-González129100.00%1100.00%

EXPORT_SYMBOL(wimax_reset); /* * Exporting to user space over generic netlink * * Parse the reset command from user space, return error code. * * No attributes. */
int wimax_gnl_doit_reset(struct sk_buff *skb, struct genl_info *info) { int result, ifindex; struct wimax_dev *wimax_dev; d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info); result = -ENODEV; if (info->attrs[WIMAX_GNL_RESET_IFIDX] == NULL) { pr_err("WIMAX_GNL_OP_RFKILL: can't find IFIDX attribute\n"); goto error_no_wimax_dev; } ifindex = nla_get_u32(info->attrs[WIMAX_GNL_RESET_IFIDX]); wimax_dev = wimax_dev_get_by_genl_info(info, ifindex); if (wimax_dev == NULL) goto error_no_wimax_dev; /* Execute the operation and send the result back to user space */ result = wimax_reset(wimax_dev); dev_put(wimax_dev->net_dev); error_no_wimax_dev: d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result); return result; }


Iñaky Pérez-González12798.45%150.00%
Fabian Frederick21.55%150.00%

Overall Contributors

Iñaky Pérez-González28597.94%125.00%
Paul Gortmaker31.03%125.00%
Fabian Frederick20.69%125.00%
André Goddard Rosa10.34%125.00%
Directory: net/wimax
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