On 6/28/22 00:25, John Garry wrote:
> ATA devices (struct ata_device) have a max_sectors field which is
> configured internally in libata. This is then used to (re)configure the
> associated sdev request queue max_sectors value from how it is earlier set
> in __scsi_init_queue(). In __scsi_init_queue() the max_sectors value is set
> according to shost limits, which includes host DMA mapping limits.
>
> Cap the ata_device max_sectors according to shost->max_sectors to respect
> this shost limit.
>
> Signed-off-by: John Garry <john.ga...@huawei.com>
> Acked-by: Damien Le Moal <damien.lem...@opensource.wdc.com>
Nit: please change the patch title to "ata: libata-scsi: Cap ..."
> ---
> drivers/ata/libata-scsi.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
> index 86dbb1cdfabd..24a43d540d9f 100644
> --- a/drivers/ata/libata-scsi.c
> +++ b/drivers/ata/libata-scsi.c
> @@ -1060,6 +1060,7 @@ int ata_scsi_dev_config(struct scsi_device *sdev,
> struct ata_device *dev)
> dev->flags |= ATA_DFLAG_NO_UNLOAD;
>
> /* configure max sectors */
> + dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors);
> blk_queue_max_hw_sectors(q, dev->max_sectors);
>
> if (dev->class == ATA_DEV_ATAPI) {
--
Damien Le Moal
Western Digital Research
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