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ipmi: handle run_to_completion properly in deliver_recv_msg()

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If run_to_completion flag is set, it means that we are running in a
single-threaded mode, and thus no locks are held.

This fixes a deadlock when IPMI notifier is being called during panic.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Corey Minyard <minyard@acm.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiri Kosina 2010-05-26 14:43:53 -07:00 committed by Linus Torvalds
parent 279fbd0c5d
commit a747c5abc3
1 changed files with 8 additions and 3 deletions
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11
drivers/char/ipmi/ipmi_si_intf.c
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@ -323,9 +323,14 @@ static void deliver_recv_msg(struct smi_info *smi_info,
{
/* Deliver the message to the upper layer with the lock
released. */
spin_unlock(&(smi_info->si_lock));
ipmi_smi_msg_received(smi_info->intf, msg);
spin_lock(&(smi_info->si_lock));
if (smi_info->run_to_completion) {
ipmi_smi_msg_received(smi_info->intf, msg);
} else {
spin_unlock(&(smi_info->si_lock));
ipmi_smi_msg_received(smi_info->intf, msg);
spin_lock(&(smi_info->si_lock));
}
}
static void return_hosed_msg(struct smi_info *smi_info, int cCode)