linux-kernel - Re: [PATCH] Fix uninitialized variable in ath6kl ath6kl_sdio_enable

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Date:	Fri, 21 Sep 2012 19:41:07 +0300
From:	Kalle Valo <kvalo@....qualcomm.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	<linux-wireless@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	ath6kl-devel <ath6kl-devel@...lcomm.com>
Subject: Re: [PATCH] Fix uninitialized variable in ath6kl ath6kl_sdio_enable_scatter

On 09/03/2012 11:15 PM, Andi Kleen wrote:
> gcc 4.8 warns
> 
> /backup/lsrc/git/linux-lto-2.6/drivers/net/wireless/ath/ath6kl/sdio.c:
> In function 'ath6kl_sdio_enable_scatter':
> /backup/lsrc/git/linux-lto-2.6/drivers/net/wireless/ath/ath6kl/sdio.c:748:16:
> warning: 'ret' may be used uninitialized in this function
> [-Wmaybe-uninitialized]
>   if (virt_scat || ret) {
>                 ^
> 
> The variable can indeed be uninitialized when the previous if branch is
> skipped. I just set it to zero for now. I'm not fully sure the fix is
> correct, maybe the || should be an && ? 

>From a quick look || should be correct, but of course I might be missing
something. I think your patch is correct way to fix this.

Thanks, applied to ath6kl.git. I just added "ath6kl:" prefix to the title.

Kalle
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