On Wed, Dec 16, 2015 at 2:29 AM, Martin K. Petersen
<martin.petersen@xxxxxxxxxx> wrote:
>>>>>> "Eryu" == Eryu Guan <guaneryu@xxxxxxxxx> writes:
>
> Eryu,
>
> Does the patch below fix the issue?
No, it can't.
As the debug log shows, it is because you use 'OPTIMAL
TRANSFER LENGTH' to set queue's max_sectors.
Thanks,
>
> --
> Martin K. Petersen Oracle Linux Engineering
>
> diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
> index 3d22fc3e3c1a..d1eb7aa78b8d 100644
> --- a/drivers/scsi/sd.c
> +++ b/drivers/scsi/sd.c
> @@ -2667,8 +2667,9 @@ static void sd_read_block_limits(struct scsi_disk *sdkp)
>
> if (buffer[3] == 0x3c) {
> unsigned int lba_count, desc_count;
> + u64 max_ws = get_unaligned_be64(&buffer[36]);
>
> - sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]);
> + sdkp->max_ws_blocks = (u32)max_ws;
>
> if (!sdkp->lbpme)
> goto out;
--
Ming Lei
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