[PATCH] staging: greybus: uart: document locking and fix indentation

[AkaLuiz <luizcarlosmdea@gmail.com>]

Add comments describing what the lock fields in struct gb_tty
protect, and fix the indentation of the
wait_for_completion_timeout() call.

Signed-off-by: AkaLuiz <luizcarlosmdea@gmail.com>
---
 drivers/staging/greybus/uart.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index 7d060b4cd33d..85586e9a4341 100644
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -50,12 +50,12 @@ struct gb_tty {
 	unsigned int minor;
 	unsigned char clocal;
 	bool disconnected;
-	spinlock_t read_lock;
-	spinlock_t write_lock;
+	spinlock_t read_lock; /* protects iocount and oldcount for TIOCMIWAIT */
+	spinlock_t write_lock; /* protects write_fifo and credits */
 	struct async_icount iocount;
 	struct async_icount oldcount;
 	wait_queue_head_t wioctl;
-	struct mutex mutex;
+	struct mutex mutex; /* protects disconnected during lookup and removal */
 	u8 ctrlin;	/* input control lines */
 	u8 ctrlout;	/* output control lines */
 	struct gb_uart_set_line_coding_request line_coding;
@@ -318,7 +318,7 @@ static int gb_uart_wait_for_all_credits(struct gb_tty *gb_tty)
 		return 0;
 
 	ret = wait_for_completion_timeout(&gb_tty->credits_complete,
-			msecs_to_jiffies(GB_UART_CREDIT_WAIT_TIMEOUT_MSEC));
+					  msecs_to_jiffies(GB_UART_CREDIT_WAIT_TIMEOUT_MSEC));
 	if (!ret) {
 		dev_err(&gb_tty->gbphy_dev->dev,
 			"time out waiting for credits\n");
-- 
2.54.0