[PATCH] staging: greybus: use proper return type for wait_for_completion_timeout

[Nicholas Mc Guire]

wait_for_completion_timeout() returns unsigned long (0 on timeout or
remaining jiffies) not int. 

Signed-off-by: Nicholas Mc Guire <hofrat@xxxxxxxxx>
---
Problem located with experimental API conformance checking cocci script

Patch was compile-tested with: x86_64_defconfig + GREYBUS=m

Patch is against 5.1-rc6 (localversion-next is next-20190426)

 drivers/staging/greybus/uart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index b3bffe9..ff18112 100644
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -323,7 +323,7 @@ static int send_break(struct gb_tty *gb_tty, u8 state)
 
 static int gb_uart_wait_for_all_credits(struct gb_tty *gb_tty)
 {
-	int ret;
+	unsigned long ret;
 
 	if (gb_tty->credits == GB_UART_FIRMWARE_CREDITS)
 		return 0;
-- 
2.1.4