linux-kernel - Re: [PATCH] lightnvm: change max_phys

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Date:	Mon, 16 Nov 2015 12:21:50 +0100
From:	Matias Bjørling <m@...rling.me>
To:	Thiago Farina <tfransosi@...il.com>
CC:	linux-block@...r.kernel.org,
	linux list <linux-kernel@...r.kernel.org>, axboe@...com,
	geert@...ux-m68k.org
Subject: Re: [PATCH] lightnvm: change max_phys_sect to ushort

On 11/16/2015 12:18 PM, Thiago Farina wrote:
> On Thu, Nov 12, 2015 at 4:35 PM, Matias Bjørling <m@...rling.me> wrote:
>> The max_phys_sect variable is defined as a char. We do a boundary check
>> to maximally allow 256 physical page descriptors per command. As we are
>> not indexing from zero. This expression is always in false. Bump the
>> max_phys_sect to an unsigned short to support the range check.
>>
> You might have to change the commit message to match the code change.
> s/unsigned short/unsigned int. RIght?

You're right. It has been fixed.

>
>> Signed-off-by: Matias Bjørling <m@...rling.me>
>> Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
>> ---
>>   include/linux/lightnvm.h | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
>> index 69c9057..4b1cd3d 100644
>> --- a/include/linux/lightnvm.h
>> +++ b/include/linux/lightnvm.h
>> @@ -220,7 +220,7 @@ struct nvm_dev_ops {
>>          nvm_dev_dma_alloc_fn    *dev_dma_alloc;
>>          nvm_dev_dma_free_fn     *dev_dma_free;
>>
>> -       uint8_t                 max_phys_sect;
>> +       unsigned int max_phys_sect;
>>   };
>>
>>   struct nvm_lun {
>
>
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