diff options
| author | Konstantin Baydarov <kbaidarov@ru.mvista.com> | 2008-04-29 01:01:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 08:06:14 -0700 |
| commit | 5956dce1485efe3816febc24aa52490dcb2be837 (patch) | |
| tree | 292231b7783baaf980a65eacb199a0384446f566 /drivers/char/ipmi/ipmi_si_intf.c | |
| parent | bda4c30aa6f7dc1483f39ea1dfe37bcab8a96207 (diff) | |
| download | linux-5956dce1485efe3816febc24aa52490dcb2be837.tar.gz linux-5956dce1485efe3816febc24aa52490dcb2be837.tar.xz | |
ipmi: don't grab locks in run-to-completion mode
This patch prevents deadlocks in IPMI panic handler caused by msg_lock
in smi_info structure and waiting_msgs_lock in ipmi_smi structure.
[cminyard@mvista.com: remove unnecessary memory barriers]
Signed-off-by: Konstantin Baydarov <kbaidarov@ru.mvista.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/ipmi/ipmi_si_intf.c')
| -rw-r--r-- | drivers/char/ipmi/ipmi_si_intf.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index 30f535657342..657034febdaf 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -289,7 +289,8 @@ static enum si_sm_result start_next_msg(struct smi_info *smi_info) /* No need to save flags, we aleady have interrupts off and we already hold the SMI lock. */ - spin_lock(&(smi_info->msg_lock)); + if (!smi_info->run_to_completion) + spin_lock(&(smi_info->msg_lock)); /* Pick the high priority queue first. */ if (!list_empty(&(smi_info->hp_xmit_msgs))) { @@ -329,7 +330,8 @@ static enum si_sm_result start_next_msg(struct smi_info *smi_info) rv = SI_SM_CALL_WITHOUT_DELAY; } out: - spin_unlock(&(smi_info->msg_lock)); + if (!smi_info->run_to_completion) + spin_unlock(&(smi_info->msg_lock)); return rv; } |