mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 15:02:32 +00:00
20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
49 lines
1.8 KiB
Diff
49 lines
1.8 KiB
Diff
From 573172b7b51a5b955627bd3d0cde5b2d2c4f9441 Mon Sep 17 00:00:00 2001
|
|
From: Nathan Chancellor <nathan@kernel.org>
|
|
Date: Mon, 31 Jan 2022 17:50:43 -0700
|
|
Subject: [PATCH] media: i2c: ov9281: Initialize id_msb to zero in
|
|
ov9281_check_sensor_id()
|
|
|
|
Clang warns:
|
|
|
|
drivers/media/i2c/ov9281.c:1132:6: warning: variable 'id_msb' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
|
|
if (!ret)
|
|
^~~~
|
|
drivers/media/i2c/ov9281.c:1135:9: note: uninitialized use occurs here
|
|
id |= (id_msb << 8);
|
|
^~~~~~
|
|
drivers/media/i2c/ov9281.c:1132:2: note: remove the 'if' if its condition is always true
|
|
if (!ret)
|
|
^~~~~~~~~
|
|
drivers/media/i2c/ov9281.c:1127:20: note: initialize the variable 'id_msb' to silence this warning
|
|
u32 id = 0, id_msb;
|
|
^
|
|
= 0
|
|
1 warning generated.
|
|
|
|
If the first ov9281_read_reg() call fails, id_msb will be used
|
|
uninitialized. However, this warning does not actually matter in
|
|
practice because the value of id is not used when either call to
|
|
ov9281_read_reg() fails, as the boolean OR will short circuit due to the
|
|
ret condition being checked first. Regardless, it is not good to use
|
|
variables uninitialized so silence the warning by initializing id_msb to
|
|
0, as was done with id.
|
|
|
|
Fixes: 20855581e0eb ("media: i2c: ov9281: Read chip ID via 2 reads")
|
|
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
|
|
---
|
|
drivers/media/i2c/ov9281.c | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
--- a/drivers/media/i2c/ov9281.c
|
|
+++ b/drivers/media/i2c/ov9281.c
|
|
@@ -1124,7 +1124,7 @@ static int ov9281_check_sensor_id(struct
|
|
struct i2c_client *client)
|
|
{
|
|
struct device *dev = &ov9281->client->dev;
|
|
- u32 id = 0, id_msb;
|
|
+ u32 id = 0, id_msb = 0;
|
|
int ret;
|
|
|
|
ret = ov9281_read_reg(client, OV9281_REG_CHIP_ID + 1,
|