[ Upstream commit 9315d904c7e8f38886e2820fa6cb8d0fa723ea21 ] the msg lock is taken for multi-link cases only but released unconditionally, leading to an unlock balance warning for single-link usages This patch fixes this. ===================================== WARNING: bad unlock balance detected! 5.1.0-16506-gc1c383a6f0a2-dirty #1523 Tainted: G W ------------------------------------- aplay/2954 is trying to release lock (&bus->msg_lock) at: do_bank_switch+0x21c/0x480 but there are no more locks to release! Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> Acked-by: Sanyog Kale <sanyog.r.kale@xxxxxxxxx> [vkoul: edited the change log as suggested by Pierre] Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/soundwire/stream.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c index 00618de2ee12..794ced434cf2 100644 --- a/drivers/soundwire/stream.c +++ b/drivers/soundwire/stream.c @@ -805,7 +805,8 @@ static int do_bank_switch(struct sdw_stream_runtime *stream) goto error; } - mutex_unlock(&bus->msg_lock); + if (bus->multi_link) + mutex_unlock(&bus->msg_lock); } return ret; -- 2.20.1
