Hi Christophe,
Thank you for the patch.
On Mon, Apr 17, 2023 at 12:14:42AM +0200, Christophe JAILLET wrote:
> If imx296_read() returns an error, its returned value is a negative value.
> But because of the "& IMX296_TMDOUT_MASK" (i.e. 0x3ff), 'tmdout' can't be
> negative.
>
> So the error handling does not work as expected and a wrong value is used
> to compute the temperature.
>
> Apply the IMX296_TMDOUT_MASK mask after checking for errors to fix it.
>
> Fixes: cb33db2b6ccf ("media: i2c: IMX296 camera sensor driver")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Dan Carpenter has submitted the same fix in
https://lore.kernel.org/linux-media/Y%2FYf19AE78jn5YW7@kili/. Sakari,
could you please pick it up ?
> ---
> drivers/media/i2c/imx296.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/imx296.c b/drivers/media/i2c/imx296.c
> index 4f22c0515ef8..c3d6d52fc772 100644
> --- a/drivers/media/i2c/imx296.c
> +++ b/drivers/media/i2c/imx296.c
> @@ -922,10 +922,12 @@ static int imx296_read_temperature(struct imx296 *sensor, int *temp)
> if (ret < 0)
> return ret;
>
> - tmdout = imx296_read(sensor, IMX296_TMDOUT) & IMX296_TMDOUT_MASK;
> + tmdout = imx296_read(sensor, IMX296_TMDOUT);
> if (tmdout < 0)
> return tmdout;
>
> + tmdout &= IMX296_TMDOUT_MASK;
> +
> /* T(°C) = 246.312 - 0.304 * TMDOUT */;
> *temp = 246312 - 304 * tmdout;
>
--
Regards,
Laurent Pinchart
