Re: [PATCH 1/2] lightnvm: use rrpc->nr_luns to calculate the rrpc area size

["Matias Bjørling" <mb@lightnvm.io>]

On 03/31/2016 10:31 AM, Wenwei Tao wrote:
> 2016-03-30 22:28 GMT+08:00 Wenwei Tao <ww.tao0320@gmail.com>:
>> rrpc->nr_sects is calculated after rrpc init luns succeeds,
>> before that the value of rrpc->nr_sects is zero, so we cannot
>> use it to calcuate rrpc area size, we use rrpc->nr_luns instead.
>>
>> Signed-off-by: Wenwei Tao <ww.tao0320@gmail.com>
>> ---
>>   drivers/lightnvm/rrpc.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
>> index 3ab6495..516a045 100644
>> --- a/drivers/lightnvm/rrpc.c
>> +++ b/drivers/lightnvm/rrpc.c
>> @@ -1223,7 +1223,7 @@ static int rrpc_area_init(struct rrpc *rrpc, sector_t *begin)
>>   {
>>          struct nvm_dev *dev = rrpc->dev;
>>          struct nvmm_type *mt = dev->mt;
>> -       sector_t size = rrpc->nr_sects * dev->sec_size;
>> +       sector_t size = dev->sec_size * dev->sec_per_lun * rrpc->nr_luns;
>
> dev->sec_size * dev->sec_per_lun * rrpc->nr_luns could be oveflow,
> should use (sector_t)dev->sec_size * dev->sec_per_lun * rrpc->nr_luns
> instead. Will submit another patch to fix it.

Hi Wenwei,

How about moving rrpc_area_init call under the rrpc_luns_init call 
instead. Then nr_sects will have been initialized?

>>
>>          size >>= 9;
>>
>> --
>> 2.7.2.333.g70bd996
>>