[PATCH] greybus: uart: fix uninitialized flow control variable

[Arnd Bergmann]

gcc-10 points out an uninitialized variable use:

drivers/staging/greybus/uart.c: In function 'gb_tty_set_termios':
drivers/staging/greybus/uart.c:540:24: error: 'newline.flow_control' is used uninitialized in this function [-Werror=uninitialized]
  540 |   newline.flow_control |= GB_SERIAL_AUTO_RTSCTS_EN;

Instead of using |= and &= on the uninitialized variable, use a
direct assignment.

Fixes: e55c25206d5c ("greybus: uart: Handle CRTSCTS flag in termios")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
 drivers/staging/greybus/uart.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index 55c51143bb09..4ffb334cd5cd 100644
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -537,9 +537,9 @@ static void gb_tty_set_termios(struct tty_struct *tty,
 	}
 
 	if (C_CRTSCTS(tty) && C_BAUD(tty) != B0)
-		newline.flow_control |= GB_SERIAL_AUTO_RTSCTS_EN;
+		newline.flow_control = GB_SERIAL_AUTO_RTSCTS_EN;
 	else
-		newline.flow_control &= ~GB_SERIAL_AUTO_RTSCTS_EN;
+		newline.flow_control = 0;
 
 	if (memcmp(&gb_tty->line_coding, &newline, sizeof(newline))) {
 		memcpy(&gb_tty->line_coding, &newline, sizeof(newline));
-- 
2.26.0