| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.9 130/757] media: i2c: fix error check on max9286_read call | Date | Tue, 27 Oct 2020 14:46:20 +0100 |
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From: Colin Ian King <colin.king@canonical.com>
[ Upstream commit e5b95c8febd504659b60a7601fd43c0ae8e4f3c0 ]
Currently the error return from the call to max9286_read is masked with 0xf0 so the following check for a negative error return is never true. Fix this by checking for an error first, then masking the return value for subsequent conflink_mask checking.
Addresses-Coverity: ("Logically dead code")
Fixes: 66d8c9d2422d ("media: i2c: Add MAX9286 driver") Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/media/i2c/max9286.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/media/i2c/max9286.c b/drivers/media/i2c/max9286.c index 47f280518fdb6..b364a3f604861 100644 --- a/drivers/media/i2c/max9286.c +++ b/drivers/media/i2c/max9286.c @@ -405,10 +405,11 @@ static int max9286_check_config_link(struct max9286_priv *priv, * to 5 milliseconds. */ for (i = 0; i < 10; i++) { - ret = max9286_read(priv, 0x49) & 0xf0; + ret = max9286_read(priv, 0x49); if (ret < 0) return -EIO; + ret &= 0xf0; if (ret == conflink_mask) break; -- 2.25.1
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