linux-kernel - Re: [PATCH] gve: Fix the size used in a 'dma_free

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Message-ID: <639bc995-9d51-3cb7-a9d1-9979ecd9c912@wanadoo.fr>
Date:   Mon, 3 Aug 2020 21:50:33 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Joe Perches <joe@...ches.com>, Jakub Kicinski <kuba@...nel.org>
Cc:     csully@...gle.com, sagis@...gle.com, jonolson@...gle.com,
        davem@...emloft.net, lrizzo@...gle.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] gve: Fix the size used in a 'dma_free_coherent()' call

Le 03/08/2020 à 21:35, Joe Perches a écrit :
> On Mon, 2020-08-03 at 21:19 +0200, Christophe JAILLET wrote:
>> Le 03/08/2020 à 17:41, Jakub Kicinski a écrit :
>>> On Sun,  2 Aug 2020 16:15:23 +0200 Christophe JAILLET wrote:
>>>> Update the size used in 'dma_free_coherent()' in order to match the one
>>>> used in the corresponding 'dma_alloc_coherent()'.
>>>>
>>>> Fixes: 893ce44df5 ("gve: Add basic driver framework for Compute Engine Virtual NIC")
>>>> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
>>>
>>> Fixes tag: Fixes: 893ce44df5 ("gve: Add basic driver framework for Compute Engine Virtual NIC")
>>> Has these problem(s):
>>> 	- SHA1 should be at least 12 digits long
>>> 	  Can be fixed by setting core.abbrev to 12 (or more) or (for git v2.11
>>> 	  or later) just making sure it is not set (or set to "auto").
>>>
>>
>> Hi,
>>
>> I have git 2.25.1 and core.abbrev is already 12, both in my global
>> .gitconfig and in the specific .git/gitconfig of my repo.
>>
>> I would have expected checkpatch to catch this kind of small issue.
>> Unless I do something wrong, it doesn't.
>>
>> Joe, does it make sense to you and would one of the following patch help?
> 
> 18 months ago I sent:
> 
> https://lore.kernel.org/lkml/40bfc40958fca6e2cc9b86101153aa0715fac4f7.camel@perches.com/
> 
> 
> 

Looks like the same spirit.
I've not tested, but doesn't the:
    ($line =~ /(?:\s|^)[0-9a-f]{12,40}(?:[\s"'\(\[]|$)/i &&
at the top short cut the rest of the regex?

I read it as "the line should have something that looks like a commit id 
of 12+ char to process further".

So smaller commit id would not be checked.
Did I miss something?


Basically, my proposal is to replace this 12 by a 5 in order to accept 
smaller strings before checking if it looks well formatted or not.

CJ