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Date:   Mon, 16 Apr 2018 11:37:05 -0700
From:   Guenter Roeck <>
Subject: Re: [PATCH 1/1] hwmon: (ina2xx) initialize mutex before locking

On Mon, Apr 16, 2018 at 10:53:23PM +0500, wrote:
> From: Ahsan Hussain <>
> Upstream commit 8d008c0c ("hwmon: (ina2xx) Make calibration register
> value fixed"), makes ina2xx_set_shunt() call mutex_lock on an
> un-initialized mutex. Initialize it prior so we don't get a NULL pointer
> dereference error.
> Fixes: 8d008c0c ("hwmon: (ina2xx) Make calibration register value fixed")
> Signed-off-by: Ahsan Hussain <>

Hmm ... the patch still does not apply ... having closer look ....

It appears that you don't use the mainline kernel. Commit 8d008c0c
is not upstream. It is in a stable release. Only which one ... ok,
I see it in linux-4.9.y. The offending commit is also in 4.4.y,
4.14.y, and 4.15.y. The fix needs to be pulled from upstream into
those stable releases. I'll send a request to Greg.


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