From a5bbc7d94cf1dcb2100eeaf68791a401ad7ce54d Mon Sep 17 00:00:00 2001
From: Ira Snyder <kernel@irasnyder.com>
Date: Mon, 20 Nov 2006 07:20:48 -0300
Subject: [PATCH] V4L/DVB (4849): Add missing spin_unlock to saa6588 decoder
driver
Sparse noticed a lock imbalance in read_from_buf(). Further inspection shows
that the lock should not be held when the function exits.
This adds a spin_unlock_irqrestore(), so that every exit path of the
read_from_buf() function is consistent. The unlock was missing on an error
path.
Signed-off-by: Ira W. Snyder <devel@irasnyder.com>
Signed-off-by: Hans J. Koch <koch@hjk-az.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
---
drivers/media/video/saa6588.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/media/video/saa6588.c b/drivers/media/video/saa6588.c
index a81285ca7d5b..7b9859c33018 100644
--- a/drivers/media/video/saa6588.c
+++ b/drivers/media/video/saa6588.c
@@ -212,8 +212,10 @@ static void read_from_buf(struct saa6588 *s, struct rds_command *a)
if (rd_blocks > s->block_count)
rd_blocks = s->block_count;
- if (!rd_blocks)
+ if (!rd_blocks) {
+ spin_unlock_irqrestore(&s->lock, flags);
return;
+ }
for (i = 0; i < rd_blocks; i++) {
if (block_to_user_buf(s, buf_ptr)) {
--
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