mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 06:08:08 +00:00
118 lines
4.0 KiB
Diff
118 lines
4.0 KiB
Diff
From 0254e953537c92df3e7d0176f401a211e944fd61 Mon Sep 17 00:00:00 2001
|
|
From: Guenter Roeck <linux@roeck-us.net>
|
|
Date: Sun, 3 Jan 2016 15:11:58 -0800
|
|
Subject: watchdog: Drop pointer to watchdog device from struct watchdog_device
|
|
|
|
The lifetime of the watchdog device pointer is different from the lifetime
|
|
of its character device. Remove it entirely to avoid race conditions.
|
|
|
|
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
|
|
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
|
|
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
|
|
---
|
|
Documentation/watchdog/watchdog-kernel-api.txt | 2 --
|
|
drivers/watchdog/watchdog_core.c | 8 ++++----
|
|
drivers/watchdog/watchdog_dev.c | 9 ++++-----
|
|
include/linux/watchdog.h | 2 --
|
|
4 files changed, 8 insertions(+), 13 deletions(-)
|
|
|
|
--- a/Documentation/watchdog/watchdog-kernel-api.txt
|
|
+++ b/Documentation/watchdog/watchdog-kernel-api.txt
|
|
@@ -44,7 +44,6 @@ The watchdog device structure looks like
|
|
|
|
struct watchdog_device {
|
|
int id;
|
|
- struct device *dev;
|
|
struct device *parent;
|
|
const struct watchdog_info *info;
|
|
const struct watchdog_ops *ops;
|
|
@@ -65,7 +64,6 @@ It contains following fields:
|
|
/dev/watchdog0 cdev (dynamic major, minor 0) as well as the old
|
|
/dev/watchdog miscdev. The id is set automatically when calling
|
|
watchdog_register_device.
|
|
-* dev: device under the watchdog class (created by watchdog_register_device).
|
|
* parent: set this to the parent device (or NULL) before calling
|
|
watchdog_register_device.
|
|
* info: a pointer to a watchdog_info structure. This structure gives some
|
|
--- a/drivers/watchdog/watchdog_core.c
|
|
+++ b/drivers/watchdog/watchdog_core.c
|
|
@@ -249,8 +249,8 @@ static int __watchdog_register_device(st
|
|
|
|
ret = register_reboot_notifier(&wdd->reboot_nb);
|
|
if (ret) {
|
|
- dev_err(wdd->dev, "Cannot register reboot notifier (%d)\n",
|
|
- ret);
|
|
+ pr_err("watchdog%d: Cannot register reboot notifier (%d)\n",
|
|
+ wdd->id, ret);
|
|
watchdog_dev_unregister(wdd);
|
|
ida_simple_remove(&watchdog_ida, wdd->id);
|
|
return ret;
|
|
@@ -262,8 +262,8 @@ static int __watchdog_register_device(st
|
|
|
|
ret = register_restart_handler(&wdd->restart_nb);
|
|
if (ret)
|
|
- dev_warn(wdd->dev, "Cannot register restart handler (%d)\n",
|
|
- ret);
|
|
+ pr_warn("watchog%d: Cannot register restart handler (%d)\n",
|
|
+ wdd->id, ret);
|
|
}
|
|
|
|
return 0;
|
|
--- a/drivers/watchdog/watchdog_dev.c
|
|
+++ b/drivers/watchdog/watchdog_dev.c
|
|
@@ -143,7 +143,8 @@ static int watchdog_stop(struct watchdog
|
|
return 0;
|
|
|
|
if (test_bit(WDOG_NO_WAY_OUT, &wdd->status)) {
|
|
- dev_info(wdd->dev, "nowayout prevents watchdog being stopped!\n");
|
|
+ pr_info("watchdog%d: nowayout prevents watchdog being stopped!\n",
|
|
+ wdd->id);
|
|
return -EBUSY;
|
|
}
|
|
|
|
@@ -604,7 +605,7 @@ static int watchdog_release(struct inode
|
|
|
|
/* If the watchdog was not stopped, send a keepalive ping */
|
|
if (err < 0) {
|
|
- dev_crit(wdd->dev, "watchdog did not stop!\n");
|
|
+ pr_crit("watchdog%d: watchdog did not stop!\n", wdd->id);
|
|
watchdog_ping(wdd);
|
|
}
|
|
|
|
@@ -750,7 +751,6 @@ int watchdog_dev_register(struct watchdo
|
|
watchdog_cdev_unregister(wdd);
|
|
return PTR_ERR(dev);
|
|
}
|
|
- wdd->dev = dev;
|
|
|
|
return ret;
|
|
}
|
|
@@ -765,8 +765,7 @@ int watchdog_dev_register(struct watchdo
|
|
|
|
void watchdog_dev_unregister(struct watchdog_device *wdd)
|
|
{
|
|
- device_destroy(&watchdog_class, wdd->dev->devt);
|
|
- wdd->dev = NULL;
|
|
+ device_destroy(&watchdog_class, wdd->wd_data->cdev.dev);
|
|
watchdog_cdev_unregister(wdd);
|
|
}
|
|
|
|
--- a/include/linux/watchdog.h
|
|
+++ b/include/linux/watchdog.h
|
|
@@ -55,7 +55,6 @@ struct watchdog_ops {
|
|
/** struct watchdog_device - The structure that defines a watchdog device
|
|
*
|
|
* @id: The watchdog's ID. (Allocated by watchdog_register_device)
|
|
- * @dev: The device for our watchdog
|
|
* @parent: The parent bus device
|
|
* @info: Pointer to a watchdog_info structure.
|
|
* @ops: Pointer to the list of watchdog operations.
|
|
@@ -82,7 +81,6 @@ struct watchdog_ops {
|
|
*/
|
|
struct watchdog_device {
|
|
int id;
|
|
- struct device *dev;
|
|
struct device *parent;
|
|
const struct watchdog_info *info;
|
|
const struct watchdog_ops *ops;
|