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path: root/drivers/char/ipmi/ipmi_watchdog.c
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Diffstat (limited to 'drivers/char/ipmi/ipmi_watchdog.c')
-rw-r--r--drivers/char/ipmi/ipmi_watchdog.c43
1 files changed, 19 insertions, 24 deletions
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c
index 2d11ddd99e5..1a0a19c5360 100644
--- a/drivers/char/ipmi/ipmi_watchdog.c
+++ b/drivers/char/ipmi/ipmi_watchdog.c
@@ -212,24 +212,16 @@ static int set_param_str(const char *val, struct kernel_param *kp)
{
action_fn fn = (action_fn) kp->arg;
int rv = 0;
- const char *end;
- char valcp[16];
- int len;
-
- /* Truncate leading and trailing spaces. */
- while (isspace(*val))
- val++;
- end = val + strlen(val) - 1;
- while ((end >= val) && isspace(*end))
- end--;
- len = end - val + 1;
- if (len > sizeof(valcp) - 1)
- return -EINVAL;
- memcpy(valcp, val, len);
- valcp[len] = '\0';
+ char *dup, *s;
+
+ dup = kstrdup(val, GFP_KERNEL);
+ if (!dup)
+ return -ENOMEM;
+
+ s = strstrip(dup);
down_read(&register_sem);
- rv = fn(valcp, NULL);
+ rv = fn(s, NULL);
if (rv)
goto out_unlock;
@@ -239,6 +231,7 @@ static int set_param_str(const char *val, struct kernel_param *kp)
out_unlock:
up_read(&register_sem);
+ kfree(dup);
return rv;
}
@@ -956,9 +949,10 @@ static int wdog_reboot_handler(struct notifier_block *this,
/* Disable the WDT if we are shutting down. */
ipmi_watchdog_state = WDOG_TIMEOUT_NONE;
panic_halt_ipmi_set_timeout();
- } else {
+ } else if (ipmi_watchdog_state != WDOG_TIMEOUT_NONE) {
/* Set a long timer to let the reboot happens, but
- reboot if it hangs. */
+ reboot if it hangs, but only if the watchdog
+ timer was already running. */
timeout = 120;
pretimeout = 0;
ipmi_watchdog_state = WDOG_TIMEOUT_RESET;
@@ -980,16 +974,17 @@ static int wdog_panic_handler(struct notifier_block *this,
{
static int panic_event_handled = 0;
- /* On a panic, if we have a panic timeout, make sure that the thing
- reboots, even if it hangs during that panic. */
- if (watchdog_user && !panic_event_handled) {
- /* Make sure the panic doesn't hang, and make sure we
- do this only once. */
+ /* On a panic, if we have a panic timeout, make sure to extend
+ the watchdog timer to a reasonable value to complete the
+ panic, if the watchdog timer is running. Plus the
+ pretimeout is meaningless at panic time. */
+ if (watchdog_user && !panic_event_handled &&
+ ipmi_watchdog_state != WDOG_TIMEOUT_NONE) {
+ /* Make sure we do this only once. */
panic_event_handled = 1;
timeout = 255;
pretimeout = 0;
- ipmi_watchdog_state = WDOG_TIMEOUT_RESET;
panic_halt_ipmi_set_timeout();
}