[PATCH] soundwire: fix double free of pointer

[Daniil Dulov]

If sdw_ml_sync_bank_switch() returns error not on the first iteration,
it leads to freeing prevously freed memory. So, set the pointer to NULL
after each successful bank switch.

Signed-off-by: Daniil Dulov <d.dulov@xxxxxxxxxx>
---
 drivers/soundwire/stream.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index 304ff2ee7d75..d650e6f0f8e7 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -833,6 +833,7 @@ static int do_bank_switch(struct sdw_stream_runtime *stream)
 				"multi link bank switch failed: %d\n", ret);
 			goto error;
 		}
+		bus->defer_msg.msg = NULL;
 
 		if (multi_link)
 			mutex_unlock(&bus->msg_lock);
-- 
2.25.1