On 06/25/2015 09:36 AM, Jiri Slaby wrote:
> On 06/25/2015, 03:44 PM, Brian King wrote:
>> Fixes another signed / unsigned array indexing bug in the ipr driver.
>
> Could you be more specific? Specifically, I fail to see why you do +1
> twice now.
Regarding the extra +1, you are correct. Its not needed. Let me fix up the
commit comment and this and resend.
Thanks,
Brian
>
>> --- linux/drivers/scsi/ipr.c~ipr_hrrq_index_fix 2015-06-23
>> 11:43:18.151741523 -0500
>> +++ linux-bjking1/drivers/scsi/ipr.c 2015-06-23 11:43:18.157741435 -0500
>> @@ -1052,10 +1052,15 @@ static void ipr_send_blocking_cmd(struct
>>
>> static int ipr_get_hrrq_index(struct ipr_ioa_cfg *ioa_cfg)
>> {
>> + unsigned int hrrq;
>> +
>> if (ioa_cfg->hrrq_num == 1)
>> - return 0;
>> - else
>> - return (atomic_add_return(1, &ioa_cfg->hrrq_index) %
>> (ioa_cfg->hrrq_num - 1)) + 1;
>> + hrrq = 0;
>> + else {
>> + hrrq = atomic_add_return(1, &ioa_cfg->hrrq_index);
>> + hrrq = ((hrrq + 1) % (ioa_cfg->hrrq_num - 1)) + 1;
>> + }
>> + return hrrq;
>
> thanks,
>
--
Brian King
Power Linux I/O
IBM Linux Technology Center
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