This is a note to let you know that I've just added the patch titled
media: i2c: tc358746: fix possible endianness issue
to the 6.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-i2c-tc358746-fix-possible-endianness-issue.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4658e2f80c9550e0659ac6236399a9908dd50ddf
Author: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
Date: Fri Dec 16 11:35:45 2022 +0100
media: i2c: tc358746: fix possible endianness issue
[ Upstream commit 5ad2e46030ad97de7fdbdaf63bb1af45c7caf3dd ]
Using the u64 v4l2_dbg_register.val directly can lead to unexpected
results depending on machine endianness. Fix this by using a local
variable which is assigned afterwards. Since tc358746_read() will init
the val variable to 0 we can assing it without checking the return value
first.
Addresses-Coverity-ID: 1527256 ("Integer handling issues")
Reported-by: coverity-bot <keescook+coverity-bot@xxxxxxxxxxxx>
Fixes: 80a21da36051 ("media: tc358746: add Toshiba TC358746 Parallel to CSI-2 bridge driver")
Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/media/i2c/tc358746.c b/drivers/media/i2c/tc358746.c
index c5a0df300a06d..4063754a67320 100644
--- a/drivers/media/i2c/tc358746.c
+++ b/drivers/media/i2c/tc358746.c
@@ -988,6 +988,7 @@ static int __maybe_unused
tc358746_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{
struct tc358746 *tc358746 = to_tc358746(sd);
+ u32 val;
int err;
/* 32-bit registers starting from CLW_DPHYCONTTX */
@@ -996,7 +997,8 @@ tc358746_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
if (!pm_runtime_get_if_in_use(sd->dev))
return 0;
- err = tc358746_read(tc358746, reg->reg, (u32 *)®->val);
+ err = tc358746_read(tc358746, reg->reg, &val);
+ reg->val = val;
pm_runtime_mark_last_busy(sd->dev);
pm_runtime_put_sync_autosuspend(sd->dev);
