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ipmi:watchdog: Use the IPMI panic handler instead of the system one

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This is a cleaner interface and the main IPMI panic handler does setup
required by the watchdog handler.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Corey Minyard 2018-03-28 13:30:38 -05:00
parent 91e2dd0a47
commit 5194970c5b
1 changed files with 23 additions and 37 deletions
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60
drivers/char/ipmi/ipmi_watchdog.c
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@ -944,9 +944,31 @@ static void ipmi_wdog_pretimeout_handler(void *handler_data)
atomic_set(&pretimeout_since_last_heartbeat, 1); atomic_set(&pretimeout_since_last_heartbeat, 1);
} }
static void ipmi_wdog_panic_handler(void *user_data)
{
static int panic_event_handled;
/*
* 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 = panic_wdt_timeout;
pretimeout = 0;
panic_halt_ipmi_set_timeout();
}
}
static const struct ipmi_user_hndl ipmi_hndlrs = { static const struct ipmi_user_hndl ipmi_hndlrs = {
.ipmi_recv_hndl = ipmi_wdog_msg_handler, .ipmi_recv_hndl = ipmi_wdog_msg_handler,
.ipmi_watchdog_pretimeout = ipmi_wdog_pretimeout_handler .ipmi_watchdog_pretimeout = ipmi_wdog_pretimeout_handler,
.ipmi_panic_handler = ipmi_wdog_panic_handler
}; };
static void ipmi_register_watchdog(int ipmi_intf) static void ipmi_register_watchdog(int ipmi_intf)
@ -1146,36 +1168,6 @@ static struct notifier_block wdog_reboot_notifier = {
.priority = 0 .priority = 0
}; };
static int wdog_panic_handler(struct notifier_block *this,
unsigned long event,
void *unused)
{
static int panic_event_handled;
/* 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 = panic_wdt_timeout;
pretimeout = 0;
panic_halt_ipmi_set_timeout();
}
return NOTIFY_OK;
}
static struct notifier_block wdog_panic_notifier = {
.notifier_call = wdog_panic_handler,
.next = NULL,
.priority = 150 /* priority: INT_MAX >= x >= 0 */
};
static void ipmi_new_smi(int if_num, struct device *device) static void ipmi_new_smi(int if_num, struct device *device)
{ {
ipmi_register_watchdog(if_num); ipmi_register_watchdog(if_num);
@ -1311,8 +1303,6 @@ static int __init ipmi_wdog_init(void)
check_parms(); check_parms();
register_reboot_notifier(&wdog_reboot_notifier); register_reboot_notifier(&wdog_reboot_notifier);
atomic_notifier_chain_register(&panic_notifier_list,
&wdog_panic_notifier);
rv = ipmi_smi_watcher_register(&smi_watcher); rv = ipmi_smi_watcher_register(&smi_watcher);
if (rv) { if (rv) {
@ -1320,8 +1310,6 @@ static int __init ipmi_wdog_init(void)
if (nmi_handler_registered) if (nmi_handler_registered)
unregister_nmi_handler(NMI_UNKNOWN, "ipmi"); unregister_nmi_handler(NMI_UNKNOWN, "ipmi");
#endif #endif
atomic_notifier_chain_unregister(&panic_notifier_list,
&wdog_panic_notifier);
unregister_reboot_notifier(&wdog_reboot_notifier); unregister_reboot_notifier(&wdog_reboot_notifier);
pr_warn(PFX "can't register smi watcher\n"); pr_warn(PFX "can't register smi watcher\n");
return rv; return rv;
@ -1342,8 +1330,6 @@ static void __exit ipmi_wdog_exit(void)
unregister_nmi_handler(NMI_UNKNOWN, "ipmi"); unregister_nmi_handler(NMI_UNKNOWN, "ipmi");
#endif #endif
atomic_notifier_chain_unregister(&panic_notifier_list,
&wdog_panic_notifier);
unregister_reboot_notifier(&wdog_reboot_notifier); unregister_reboot_notifier(&wdog_reboot_notifier);
} }
module_exit(ipmi_wdog_exit); module_exit(ipmi_wdog_exit);