drivers/macintosh/smu.c: fix locking snafu

It got its lock and unlock backwards.

Fixes http://bugzilla.kernel.org/show_bug.cgi?id=8334

(obviously, this code could be using plain old spin_lock_irq(), too)

Cc: <matthias.kaehlcke@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c
index 3096836..c9f3dc4 100644 (file)
--- a/drivers/macintosh/smu.c
+++ b/drivers/macintosh/smu.c
@@ -1259,9 +1259,9 @@ static int smu_release(struct inode *inode, struct file *file)
                        set_current_state(TASK_UNINTERRUPTIBLE);
                        if (pp->cmd.status != 1)
                                break;
-                       spin_lock_irqsave(&pp->lock, flags);
-                       schedule();
                        spin_unlock_irqrestore(&pp->lock, flags);
+                       schedule();
+                       spin_lock_irqsave(&pp->lock, flags);
                }
                set_current_state(TASK_RUNNING);
                remove_wait_queue(&pp->wait, &wait);