linux-kernel - Re: [PATCH net] wifi: airo: avoid uninitialized warning in airo_get

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Date:   Thu, 13 Jul 2023 09:38:43 +0100
From:   Simon Horman <simon.horman@...igine.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Kalle Valo <kvalo@...nel.org>, linux-wireless@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net] wifi: airo: avoid uninitialized warning in
 airo_get_rate()

On Tue, Jul 11, 2023 at 02:07:57PM -0700, Randy Dunlap wrote:
> Hi Simon,
> 
> On 7/11/23 10:25, Simon Horman wrote:
> > On Sun, Jul 09, 2023 at 06:31:54AM -0700, Randy Dunlap wrote:
> >> Quieten a gcc (11.3.0) build error or warning by checking the function
> >> call status and returning -EBUSY if the function call failed.
> >> This is similar to what several other wireless drivers do for the
> >> SIOCGIWRATE ioctl call when there is a locking problem.
> >>
> >> drivers/net/wireless/cisco/airo.c: error: 'status_rid.currentXmitRate' is used uninitialized [-Werror=uninitialized]
> > 
> > Hi Randy,
> > 
> > There seem to be other calls to readStatusRid() in the same file
> > with similar properties. Perhaps it would be best to fix them too?
> > 
> 
> Yes, there are 40+ calls that could have problems.
> Please see this thread:
>   https://lore.kernel.org/all/2f6ffd1c-a756-b7b8-bba4-77c2308f26b9@infradead.org/
> 
> This is an attempt to shut up the build error/warning, which only occurs after
> this one function call.
> 
> For such an old driver/hardware, I don't plan to do massive surgery
> to it.

Thanks Randy,

given the circumstances I agree this is a reasonable approach.

Reviewed-by: Simon Horman <simon.horman@...igine.com>