From c40ecc12cfdb630332198a04e2832ae8218a61f1 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 13 Nov 2014 14:25:11 +0100 Subject: scsi: avoid ->change_queue_depth indirection for queue full tracking All drivers use the implementation for ramping the queue up and down, so instead of overloading the change_queue_depth method call the implementation diretly if the driver opts into it by setting the track_queue_depth flag in the host template. Note that a few drivers validated the new queue depth in their change_queue_depth method, but as we never go over the queue depth set during slave_configure or the sysfs file this isn't nessecary and can safely be removed. Signed-off-by: Christoph Hellwig Reviewed-by: Mike Christie Reviewed-by: Hannes Reinecke Reviewed-by: Venkatesh Srinivas --- drivers/scsi/lpfc/lpfc_scsi.c | 23 +++-------------------- 1 file changed, 3 insertions(+), 20 deletions(-) (limited to 'drivers/scsi/lpfc') diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index 80351fff1a07..522854920369 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -255,26 +255,7 @@ lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) static int lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason) { - struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; - - switch (reason) { - case SCSI_QDEPTH_DEFAULT: - /* change request from sysfs, fall through */ - case SCSI_QDEPTH_RAMP_UP: - scsi_adjust_queue_depth(sdev, qdepth); - break; - case SCSI_QDEPTH_QFULL: - if (scsi_track_queue_full(sdev, qdepth) == 0) - return sdev->queue_depth; - - lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, - "0711 detected queue full - lun queue " - "depth adjusted to %d.\n", sdev->queue_depth); - break; - default: - return -EOPNOTSUPP; - } - + scsi_adjust_queue_depth(sdev, qdepth); return sdev->queue_depth; } @@ -5918,6 +5899,7 @@ struct scsi_host_template lpfc_template = { .change_queue_depth = lpfc_change_queue_depth, .change_queue_type = scsi_change_queue_type, .use_blk_tags = 1, + .track_queue_depth = 1, }; struct scsi_host_template lpfc_vport_template = { @@ -5942,4 +5924,5 @@ struct scsi_host_template lpfc_vport_template = { .change_queue_depth = lpfc_change_queue_depth, .change_queue_type = scsi_change_queue_type, .use_blk_tags = 1, + .track_queue_depth = 1, }; -- cgit v1.2.3