Using the helper blk_queue_required_elevator_features(), set the elevator feature ELEVATOR_F_ZBD_SEQ_WRITE as required for the request queue of SCSI ZBC disks. This feature requirement can always be satisfied as the mq-deadline elevator is always selected for in-kernel compilation when CONFIG_BLK_DEV_ZONED (zoned block device support) is enabled. Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> --- drivers/scsi/sd_zbc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index 367614f0e34f..de4019dc0f0b 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -493,6 +493,8 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf) blk_queue_chunk_sectors(sdkp->disk->queue, logical_to_sectors(sdkp->device, zone_blocks)); blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, sdkp->disk->queue); + blk_queue_required_elevator_features(sdkp->disk->queue, + ELEVATOR_F_ZBD_SEQ_WRITE); nr_zones = round_up(sdkp->capacity, zone_blocks) >> ilog2(zone_blocks); /* READ16/WRITE16 is mandatory for ZBC disks */ -- 2.21.0
