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

[Tejun Heo <tj@kernel.org>]

Figo.zhang wrote:
> 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@gmail.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.

Yeah, I saw that but I still think it would be (minutely) better to
just pass through the error value.  It isn't exclusive with double
error checking, just do err = vmap_pud_range(); if (err) return err;

Thanks.

-- 
tejun