staging: pi433: add comment to rx_lock mutex definition
Checkpatch reports: CHECK: struct mutex definition without comment.
Fix this by documenting what rx_mutex struct is used for in pi433
driver.
Signed-off-by: Paulo Miguel Almeida <paulo.miguel.almeida.rodenas@gmail.com>
Link: https://lore.kernel.org/r/20220103232616.GA11161@mail.google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c
index 29bd376..68c09fa 100644
--- a/drivers/staging/pi433/pi433_if.c
+++ b/drivers/staging/pi433/pi433_if.c
@@ -92,7 +92,7 @@ struct pi433_device {
u32 rx_bytes_to_drop;
u32 rx_bytes_dropped;
unsigned int rx_position;
- struct mutex rx_lock;
+ struct mutex rx_lock; /* protects rx_* variable accesses */
wait_queue_head_t rx_wait_queue;
/* fifo wait queue */
