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| author | Robert Lippert <roblip@gmail.com> | 2017-04-20 16:49:47 -0700 |
|---|---|---|
| committer | Corey Minyard <cminyard@mvista.com> | 2017-04-28 14:53:17 -0500 |
| commit | 2c1175c2e8e5487233cabde358a19577562ac83e (patch) | |
| tree | e67f34d54acb1685b5947da6afc335b3f1158368 | |
| parent | 3f724c408a7bcf25609f6a0102b835d5970cadd3 (diff) | |
| download | linux-2c1175c2e8e5487233cabde358a19577562ac83e.tar.bz2 | |
ipmi/watchdog: fix wdog hang on panic waiting for ipmi response
Commit c49c097610fe ("ipmi: Don't call receive handler in the
panic context") means that the panic_recv_free is not called during a
panic and the atomic count does not drop to 0.
Fix this by only expecting one decrement of the atomic variable
which comes from panic_smi_free.
Signed-off-by: Robert Lippert <rlippert@google.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
| -rw-r--r-- | drivers/char/ipmi/ipmi_watchdog.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c index 5ca24d9b101b..d165af8abe36 100644 --- a/drivers/char/ipmi/ipmi_watchdog.c +++ b/drivers/char/ipmi/ipmi_watchdog.c @@ -516,7 +516,7 @@ static void panic_halt_ipmi_heartbeat(void) msg.cmd = IPMI_WDOG_RESET_TIMER; msg.data = NULL; msg.data_len = 0; - atomic_add(2, &panic_done_count); + atomic_add(1, &panic_done_count); rv = ipmi_request_supply_msgs(watchdog_user, (struct ipmi_addr *) &addr, 0, @@ -526,7 +526,7 @@ static void panic_halt_ipmi_heartbeat(void) &panic_halt_heartbeat_recv_msg, 1); if (rv) - atomic_sub(2, &panic_done_count); + atomic_sub(1, &panic_done_count); } static struct ipmi_smi_msg panic_halt_smi_msg = { @@ -550,12 +550,12 @@ 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_add(2, &panic_done_count); + atomic_add(1, &panic_done_count); rv = i_ipmi_set_timeout(&panic_halt_smi_msg, &panic_halt_recv_msg, &send_heartbeat_now); if (rv) { - atomic_sub(2, &panic_done_count); + atomic_sub(1, &panic_done_count); printk(KERN_WARNING PFX "Unable to extend the watchdog timeout."); } else { |