IR/lirc_dev: fix locking in lirc_dev_fop_read

Commit Message

Jarod Wilson July 7, 2010, 2:29 p.m. UTC

None

Patch

diff --git a/drivers/media/IR/lirc_dev.c b/drivers/media/IR/lirc_dev.c
index 9e141d5..64170fa 100644
--- a/drivers/media/IR/lirc_dev.c
+++ b/drivers/media/IR/lirc_dev.c
@@ -657,7 +657,9 @@  ssize_t lirc_dev_fop_read(struct file *file,
 
 			if (mutex_lock_interruptible(&ir->irctl_lock)) {
 				ret = -ERESTARTSYS;
-				break;
+				remove_wait_queue(&ir->buf->wait_poll, &wait);
+				set_current_state(TASK_RUNNING);
+				goto out_unlocked;
 			}
 
 			if (!ir->attached) {
@@ -676,6 +678,7 @@  ssize_t lirc_dev_fop_read(struct file *file,
 	set_current_state(TASK_RUNNING);
 	mutex_unlock(&ir->irctl_lock);
 
+out_unlocked:
 	dev_dbg(ir->d.dev, LOGHEAD "read result = %s (%d)\n",
 		ir->d.name, ir->d.minor, ret ? "-EFAULT" : "OK", ret);