diff options
| -rw-r--r-- | drivers/char/ipmi/ipmi_watchdog.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c index 405697a9f4d..1f3159eb1ed 100644 --- a/drivers/char/ipmi/ipmi_watchdog.c +++ b/drivers/char/ipmi/ipmi_watchdog.c @@ -49,6 +49,7 @@ #include <linux/poll.h> #include <linux/string.h> #include <linux/ctype.h> +#include <asm/atomic.h> #ifdef CONFIG_X86_LOCAL_APIC #include <asm/apic.h> #endif @@ -295,6 +296,8 @@ static int ipmi_start_timer_on_heartbeat = 0; static unsigned char ipmi_version_major; static unsigned char ipmi_version_minor; +/* If a pretimeout occurs, this is used to allow only one panic to happen. */ +static atomic_t preop_panic_excl = ATOMIC_INIT(-1); static int ipmi_heartbeat(void); static void panic_halt_ipmi_heartbeat(void); @@ -837,9 +840,10 @@ static void ipmi_wdog_msg_handler(struct ipmi_recv_msg *msg, static void ipmi_wdog_pretimeout_handler(void *handler_data) { if (preaction_val != WDOG_PRETIMEOUT_NONE) { - if (preop_val == WDOG_PREOP_PANIC) - panic("Watchdog pre-timeout"); - else if (preop_val == WDOG_PREOP_GIVE_DATA) { + if (preop_val == WDOG_PREOP_PANIC) { + if (atomic_inc_and_test(&preop_panic_excl)) + panic("Watchdog pre-timeout"); + } else if (preop_val == WDOG_PREOP_GIVE_DATA) { spin_lock(&ipmi_read_lock); data_to_read = 1; wake_up_interruptible(&read_q); @@ -913,7 +917,8 @@ ipmi_nmi(void *dev_id, struct pt_regs *regs, int cpu, int handled) an error and not work unless we re-enable the timer. So do so. */ pretimeout_since_last_heartbeat = 1; - panic(PFX "pre-timeout"); + if (atomic_inc_and_test(&preop_panic_excl)) + panic(PFX "pre-timeout"); } return NOTIFY_DONE; |