linux-kernel - Re: [PATCH] vmalloc.c: fix double error checking

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Date:	Wed, 08 Jul 2009 08:40:06 +0800
From:	"Figo.zhang" <figo1802@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Andrew Morton <akpm@...l.org>, lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] vmalloc.c: fix double error checking

On Wed, 2009-07-08 at 09:19 +0900, Tejun Heo wrote:
> Figo.zhang wrote:
> > it is no need for double error checking.
> > 
> > Signed-off-by: Figo.zhang <figo1802@...il.com>
> > -		err = vmap_pud_range(pgd, addr, next, prot, pages, &nr);
> > -		if (err)
> > -			break;
> > +		if (vmap_pud_range(pgd, addr, next, prot, pages, &nr))
> > +			return -ENOMEM;
> 
> Wouldn't it be better to keep the error return value?

see the vmap_pud_range(), if suceed return 0, if error return "-ENOMEM",
so it had better use clearly logic if error directly return "-EOMEM",
avoid double checking.

Best,
Figo.zhang


> 
> Thanks.
> 
> --
> tejun

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