linux-kernel - Re: [PATCH] iio: gp2ap020a00f: Fix signedness bug

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Date:   Fri, 15 Apr 2022 09:21:17 +0800
From:   baihaowen <baihaowen@...zu.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
CC:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        linux-iio <linux-iio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] iio: gp2ap020a00f: Fix signedness bug

在 4/14/22 9:47 PM, Andy Shevchenko 写道:
> On Thu, Apr 14, 2022 at 2:19 PM Haowen Bai <baihaowen@...zu.com> wrote:
>> function gp2ap020a00f_get_thresh_reg() is unsigned but returning -EINVAL
>> errcode, and thresh_reg_l is unsigned but receiving -EINVAL errcode. so
>> we have to change u8 -> s8.
> s8 is not enough to hold an (arbitrary) error code. To be on the safe
> side you need to use int.
>
Thank you for your suggestion.

-- 
Haowen Bai