127 lines
3.8 KiB
Diff
127 lines
3.8 KiB
Diff
Index: linux-2.6.38-rc6/drivers/cbus/retu-wdt.c
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===================================================================
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--- linux-2.6.38-rc6.orig/drivers/cbus/retu-wdt.c 2011-03-02 16:08:59.022211654 +0100
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+++ linux-2.6.38-rc6/drivers/cbus/retu-wdt.c 2011-03-02 16:29:43.215284501 +0100
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@@ -58,13 +58,11 @@ struct retu_wdt_dev {
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struct device *dev;
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int users;
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struct miscdevice retu_wdt_miscdev;
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- struct timer_list ping_timer;
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+ struct delayed_work ping_work;
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};
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static struct retu_wdt_dev *retu_wdt;
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-static void retu_wdt_set_ping_timer(unsigned long enable);
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-
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static int _retu_modify_counter(unsigned int new)
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{
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if (retu_wdt)
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@@ -86,6 +84,31 @@ static int retu_modify_counter(unsigned
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return 0;
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}
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+/*
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+ * Since retu watchdog cannot be disabled in hardware, we must kick it
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+ * with a timer until userspace watchdog software takes over. Do this
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+ * unless /dev/watchdog is open or CONFIG_WATCHDOG_NOWAYOUT is set.
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+ */
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+static void retu_wdt_ping_enable(struct retu_wdt_dev *wdev)
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+{
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+ _retu_modify_counter(RETU_WDT_MAX_TIMER);
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+ schedule_delayed_work(&wdev->ping_work,
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+ round_jiffies_relative(RETU_WDT_DEFAULT_TIMER * HZ));
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+}
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+
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+static void retu_wdt_ping_disable(struct retu_wdt_dev *wdev)
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+{
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+ _retu_modify_counter(RETU_WDT_MAX_TIMER);
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+ cancel_delayed_work_sync(&wdev->ping_work);
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+}
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+
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+static void retu_wdt_ping_work(struct work_struct *work)
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+{
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+ struct retu_wdt_dev *wdev = container_of(to_delayed_work(work),
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+ struct retu_wdt_dev, ping_work);
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+ retu_wdt_ping_enable(wdev);
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+}
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+
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static ssize_t retu_wdt_period_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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@@ -105,7 +128,7 @@ static ssize_t retu_wdt_period_store(str
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int ret;
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#ifdef CONFIG_WATCHDOG_NOWAYOUT
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- retu_wdt_set_ping_timer(0);
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+ retu_wdt_ping_disable(retu_wdt);
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#endif
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if (sscanf(buf, "%u", &new_period) != 1) {
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@@ -136,30 +159,13 @@ static DEVICE_ATTR(period, S_IRUGO | S_I
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retu_wdt_period_store);
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static DEVICE_ATTR(counter, S_IRUGO, retu_wdt_counter_show, NULL);
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-/*----------------------------------------------------------------------------*/
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-
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-/*
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- * Since retu watchdog cannot be disabled in hardware, we must kick it
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- * with a timer until userspace watchdog software takes over. Do this
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- * unless /dev/watchdog is open or CONFIG_WATCHDOG_NOWAYOUT is set.
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- */
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-static void retu_wdt_set_ping_timer(unsigned long enable)
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-{
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- _retu_modify_counter(RETU_WDT_MAX_TIMER);
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- if (enable)
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- mod_timer(&retu_wdt->ping_timer,
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- jiffies + RETU_WDT_DEFAULT_TIMER * HZ);
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- else
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- del_timer_sync(&retu_wdt->ping_timer);
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-}
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-
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static int retu_wdt_open(struct inode *inode, struct file *file)
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{
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if (test_and_set_bit(1, (unsigned long *)&(retu_wdt->users)))
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return -EBUSY;
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file->private_data = (void *)retu_wdt;
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- retu_wdt_set_ping_timer(0);
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+ retu_wdt_ping_disable(retu_wdt);
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return nonseekable_open(inode, file);
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}
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@@ -169,7 +175,7 @@ static int retu_wdt_release(struct inode
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struct retu_wdt_dev *wdev = file->private_data;
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#ifndef CONFIG_WATCHDOG_NOWAYOUT
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- retu_wdt_set_ping_timer(1);
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+ retu_wdt_ping_enable(retu_wdt);
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#endif
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wdev->users = 0;
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@@ -232,7 +238,7 @@ static int __devinit retu_wdt_ping(void)
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#ifdef CONFIG_WATCHDOG_NOWAYOUT
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retu_modify_counter(RETU_WDT_MAX_TIMER);
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#else
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- retu_wdt_set_ping_timer(1);
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+ retu_wdt_ping_enable(retu_wdt);
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#endif
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return 0;
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@@ -283,7 +289,7 @@ static int __init retu_wdt_probe(struct
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if (ret)
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goto free3;
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- setup_timer(&wdev->ping_timer, retu_wdt_set_ping_timer, 1);
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+ INIT_DELAYED_WORK(&wdev->ping_work, retu_wdt_ping_work);
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/* passed as module parameter? */
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ret = retu_modify_counter(counter_param);
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@@ -326,6 +332,7 @@ static int __devexit retu_wdt_remove(str
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misc_deregister(&wdev->retu_wdt_miscdev);
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device_remove_file(&pdev->dev, &dev_attr_period);
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device_remove_file(&pdev->dev, &dev_attr_counter);
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+ cancel_delayed_work_sync(&wdev->ping_work);
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kfree(wdev);
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return 0;
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