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authorJulia Lawall <julia@diku.dk>2010-03-29 05:34:46 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-04-07 18:00:44 +1000
commit86e4754ac8fde9a9c913571016bc31257aa2e195 (patch)
treec96a3df8769e488a6a03e40c330e9cacc872045a /drivers/macintosh/smu.c
parentf6d8c8bb1d360272d795927d39f3d2c5934e77d9 (diff)
powerpc/pmac: Add missing unlocks in error path
In some error handling cases the lock is not unlocked. A simplified version of the semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ expression E1; identifier f; @@ f (...) { <+... * spin_lock_irqsave (E1,...); ... when != E1 * return ...; ...+> } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/macintosh/smu.c')
-rw-r--r--drivers/macintosh/smu.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c
index 888448cf7f1..c9da5c4c167 100644
--- a/drivers/macintosh/smu.c
+++ b/drivers/macintosh/smu.c
@@ -1183,8 +1183,10 @@ static ssize_t smu_read_command(struct file *file, struct smu_private *pp,
return -EOVERFLOW;
spin_lock_irqsave(&pp->lock, flags);
if (pp->cmd.status == 1) {
- if (file->f_flags & O_NONBLOCK)
+ if (file->f_flags & O_NONBLOCK) {
+ spin_unlock_irqrestore(&pp->lock, flags);
return -EAGAIN;
+ }
add_wait_queue(&pp->wait, &wait);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);