linux-kernel - Re: [PATCH] ALSA: au88x0: use explicitly signed char

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Date:   Tue, 25 Oct 2022 01:59:50 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     linux-kernel@...r.kernel.org, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org
Subject: Re: [PATCH] ALSA: au88x0: use explicitly signed char

Hi Al,

On Mon, Oct 24, 2022 at 11:11 PM Al Viro <viro@...iv.linux.org.uk> wrote:
>
> On Mon, Oct 24, 2022 at 06:29:29PM +0200, Jason A. Donenfeld wrote:
> > With char becoming unsigned by default, and with `char` alone being
> > ambiguous and based on architecture, signed chars need to be marked
> > explicitly as such. This fixes warnings like:
>
> It might make sparse to STFU, but it does *not* resolve the underlying
> issue:
>
> vortex_adb_checkinout() returns a number in range of 0..31 on success
> and -ENOMEM on failure.  Quite a few callers don't bother to check...

Yea, I saw that. I assume that the places that don't check don't
*need* to check. But maybe this driver is junk and other bugs lurk.
I'm not sure. Either way, I think this change is certainly an
improvement on the status quo. I don't intend to develop further on
it, but feel free to send patches atop once this lands.

Jason