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authorAlan Stern <stern@rowland.harvard.edu>2008-02-29 19:50:22 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2008-03-05 01:47:05 +0300
commit1b3cbec1dcb6747b587b40335f5de1d9e035063c (patch)
tree7e24a74ac0c8082581335c764b184e0ae027804e /drivers/base/power
parent7a8d37a37380e2b1500592d40b7ec384dbebe7a0 (diff)
downloadlinux-1b3cbec1dcb6747b587b40335f5de1d9e035063c.tar.xz
PM: fix new mutex-locking bug in the PM core
This patch (as1041) fixes a bug introduced by the acquire-all-device-semaphores reversion. The error pathway of dpm_suspend() fails to reacquire a mutex it should be holding. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/power')
-rw-r--r--drivers/base/power/main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index b0c16f6fc186..d887d5cb5bef 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -428,6 +428,7 @@ static int dpm_suspend(pm_message_t state)
mutex_unlock(&dpm_list_mtx);
error = suspend_device(dev, state);
+ mutex_lock(&dpm_list_mtx);
if (error) {
printk(KERN_ERR "Could not suspend device %s: "
"error %d%s\n",
@@ -438,7 +439,6 @@ static int dpm_suspend(pm_message_t state)
""));
break;
}
- mutex_lock(&dpm_list_mtx);
if (!list_empty(&dev->power.entry))
list_move(&dev->power.entry, &dpm_off);
}