linux-kernel - Re: [PATCH v11 07/15] iio: afe: rescale: use s64 for temporary scale calculations

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Message-ID: <YcNsxNPWY4lc/PHf@shaak>
Date:   Wed, 22 Dec 2021 13:21:56 -0500
From:   Liam Beguin <liambeguin@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Peter Rosin <peda@...ntia.se>, Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v11 07/15] iio: afe: rescale: use s64 for temporary scale
 calculations

On Wed, Dec 22, 2021 at 02:25:31PM +0200, Andy Shevchenko wrote:
> On Wed, Dec 22, 2021 at 5:47 AM Liam Beguin <liambeguin@...il.com> wrote:
> >
> > From: Liam Beguin <lvb@...hos.com>
> >
> > All four scaling coefficients can take signed values.
> > Make tmp a signed 64-bit integer and switch to div_s64() to preserve
> > signs during 64-bit divisions.
> 
> Sounds to me like a fix with all necessary stuff needed about it:
> - Fixes tag
> - moving to the beginning of the series, where other fixes are

Will do

> -- 
> With Best Regards,
> Andy Shevchenko