linux-kernel - Re: [PATCH] gpio: mockup: fix debugfs read

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Message-ID: <CACRpkdbw7zvYx1s742HmYj8E=J0=SygEgBHVDyQ5c84N70V3fA@mail.gmail.com>
Date:   Thu, 28 Mar 2019 17:37:50 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH] gpio: mockup: fix debugfs read

On Fri, Mar 22, 2019 at 6:30 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:

> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
>
> The debugfs read callback must advance ppos or users using read() on
> the file descriptor will never get the EOL. This wasn't spotted before
> as I was using busybox cat for testing which uses sendfile() internally
> and only noticed it now when switched to cat from coreutils.
>
> Fixes: 2a9e27408e12 ("gpio: mockup: rework debugfs interface")
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>

Patch applied for fixes.
Sorry for slow application, I was in no-wifi-land for some days.

Yours,
Linus Walleij