linux-kernel - Re: [PATCH] uio.c: Fix warning: 'ret' might be used uninitialized

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Message-ID: <CAM3j68p0i-AeuKX9CfU99pbmtj9PT_GOom+nzCZWdAMmGm8XMQ@mail.gmail.com>
Date:	Thu, 29 Nov 2012 17:33:24 +0100
From:	Cong Ding <dinggnu@...il.com>
To:	Vitalii Demianets <vitas@...factor.kiev.ua>
Cc:	"Hans J. Koch" <hjk@...sjkoch.de>, linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] uio.c: Fix warning: 'ret' might be used uninitialized

No, there are some exceptions. Imagine this case, when mi=0,
everything works correct in the loop, and then mi=1, if the kzalloc in
line 286 fails, you patch will goto err_map with ret=-ENOMEM, while
Hans's patch will goto err_map with ret=0 (the ret=0 is from line 295
when mi=0).

On Thu, Nov 29, 2012 at 5:22 PM, Vitalii Demianets
<vitas@...factor.kiev.ua> wrote:
> Actually, both patches do exactly the same thing. Hans's patch establishes
> default value for the ret for all those "other" cases when ret is not
> explicitly overridden. My patch explicitly enumerates all those "other" cases
> in more wordily manner.
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