linux-kernel - Re: [PATCH] media: i2c: imx296: Fix error handling while reading temperature

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Date:   Mon, 17 Apr 2023 13:00:14 +0300
From:   Sakari Ailus <sakari.ailus@...ux.intel.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-media@...r.kernel.org
Subject: Re: [PATCH] media: i2c: imx296: Fix error handling while reading
 temperature

Hi Laurent,

On Mon, Apr 17, 2023 at 08:30:59AM +0300, Laurent Pinchart wrote:
> 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@...adoo.fr>
> 
> Dan Carpenter has submitted the same fix in
> https://lore.kernel.org/linux-media/Y%2FYf19AE78jn5YW7@kili/. Sakari,
> could you please pick it up ?

Oops, thanks for notifying me. This slipped from my hands somehow. It's in
my tree now.

-- 
Sakari Ailus