Commit 2b5f69e6 authored Mar 14, 2023 by Daniil Dulov Committed by Greg Kroah-Hartman Aug 11, 2023

media: usb: Check az6007_read() return value



[ Upstream commit fdaca63186f59fc664b346c45b76576624b48e57 ]

If az6007_read() returns error, there is no sence to continue.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 3af2f4f1 ("[media] az6007: Change the az6007 read/write routine parameter")
Signed-off-by: Daniil Dulov <d.dulov@aladdin.ru>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 9ce5d632

drivers/media/usb/dvb-usb-v2/az6007.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -210,7 +210,8 @@ static int az6007_rc_query(struct dvb_usb_device *d)
		unsigned code;
		enum rc_proto proto;

		az6007_read(d, AZ6007_READ_IR, 0, 0, st->data, 10);
		if (az6007_read(d, AZ6007_READ_IR, 0, 0, st->data, 10) < 0)
		return -EIO;

		if (st->data[1] == 0x44)
		return 0;