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Re: [PATCH for-5.2?] nbd: Silence Coverity false positive


From: Richard Henderson
Subject: Re: [PATCH for-5.2?] nbd: Silence Coverity false positive
Date: Thu, 12 Nov 2020 13:18:03 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

On 11/12/20 1:09 PM, Eric Blake wrote:
> On 11/12/20 3:04 PM, Richard Henderson wrote:
>> On 11/11/20 8:35 AM, Eric Blake wrote:
>>> -    if (!full) {
>>> -        /* last non dirty extent */
>>> -        nbd_extent_array_add(es, end - start, 0);
>>> +    if (!full && nbd_extent_array_add(es, end - start, 0) < 0) {
>>> +        /* last non dirty extent, nothing to do if array was already full 
>>> */
>>>      }
>>
>> Casting to (void) is another way to get rid of the warning.
>>
>> I dunno which makes more sense here.  Definitely the comment is helpful.
> 
> As in:
> 
> if (!full) {
>     /* last non dirty extent, nothing to do if array is now full */
>     (void) nbd_extent_array_add(es, end - start, 0);
> }

Yep.

> Yeah, that looks a little better.  Should I post that as v2, or wait for
> further comments on this?

Up to you.  You can have my
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
for either version.


r~




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