From: Corey Minyard Date: Mon, 20 Sep 2021 11:25:37 +0000 (-0500) Subject: ipmi:watchdog: Set panic count to proper value on a panic X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=db05ddf7f321634c5659a0cf7ea56594e22365f7;p=linux.git ipmi:watchdog: Set panic count to proper value on a panic You will get two decrements when the messages on a panic are sent, not one, since commit 2033f6858970 ("ipmi: Free receive messages when in an oops") was added, but the watchdog code had a bug where it didn't set the value properly. Reported-by: Anton Lundin Cc: # v5.4+ Fixes: 2033f6858970 ("ipmi: Free receive messages when in an oops") Signed-off-by: Corey Minyard --- diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c index e4ff3b50de7f3..f855a9665c284 100644 --- a/drivers/char/ipmi/ipmi_watchdog.c +++ b/drivers/char/ipmi/ipmi_watchdog.c @@ -497,7 +497,7 @@ static void panic_halt_ipmi_heartbeat(void) msg.cmd = IPMI_WDOG_RESET_TIMER; msg.data = NULL; msg.data_len = 0; - atomic_inc(&panic_done_count); + atomic_add(2, &panic_done_count); rv = ipmi_request_supply_msgs(watchdog_user, (struct ipmi_addr *) &addr, 0, @@ -507,7 +507,7 @@ static void panic_halt_ipmi_heartbeat(void) &panic_halt_heartbeat_recv_msg, 1); if (rv) - atomic_dec(&panic_done_count); + atomic_sub(2, &panic_done_count); } static struct ipmi_smi_msg panic_halt_smi_msg = { @@ -531,12 +531,12 @@ static void panic_halt_ipmi_set_timeout(void) /* Wait for the messages to be free. */ while (atomic_read(&panic_done_count) != 0) ipmi_poll_interface(watchdog_user); - atomic_inc(&panic_done_count); + atomic_add(2, &panic_done_count); rv = __ipmi_set_timeout(&panic_halt_smi_msg, &panic_halt_recv_msg, &send_heartbeat_now); if (rv) { - atomic_dec(&panic_done_count); + atomic_sub(2, &panic_done_count); pr_warn("Unable to extend the watchdog timeout\n"); } else { if (send_heartbeat_now)