From: Oscar Carter oscar.carter@gmx.com

commit 34625c1931f8204c234c532b446b9f53c69f4b68 upstream.

In the "gb_tty_set_termios" function the "newline" variable is declared but not initialized. So the "flow_control" member is not initialized and the OR / AND operations with itself results in an undefined value in this member.

The purpose of the code is to set the flow control type, so remove the OR / AND self operator and set the value directly.

Addresses-Coverity-ID: 1374016 ("Uninitialized scalar variable") Fixes: e55c25206d5c9 ("greybus: uart: Handle CRTSCTS flag in termios") Signed-off-by: Oscar Carter oscar.carter@gmx.com Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/20200510101426.23631-1-oscar.carter@gmx.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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));