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authorVasu Dev <vasu.dev@intel.com>2009-10-15 17:46:55 -0700
committerJames Bottomley <James.Bottomley@suse.de>2009-12-04 12:00:43 -0600
commit14caf44c69184ed72d46a2f883311daf27a4192f (patch)
treecdfdf95ea884116de6595cc8d89482b89ba8ccaa /drivers/scsi
parent5c20848a096fb1880ded99816be79d78ca1cd696 (diff)
[SCSI] fcoe, libfc: fix an libfc issue with queue ramp down in libfc
The cmd_per_lun value is used by scsi-ml as fall back lowest queue_depth value but in case of libfc cmd_per_lun is set to same value as max queue_depth = 32. So this patch reduces cmd_per_lun value to 3 and configures each lun with default max queue_depth 32 in fc_slave_alloc. Signed-off-by: Vasu Dev <vasu.dev@intel.com> Acked-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/fcoe/fcoe.c2
-rw-r--r--drivers/scsi/libfc/fc_fcp.c14
2 files changed, 7 insertions, 9 deletions
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index aef29afb6e7..4efbc17a7d7 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -137,7 +137,7 @@ static struct scsi_host_template fcoe_shost_template = {
.change_queue_depth = fc_change_queue_depth,
.change_queue_type = fc_change_queue_type,
.this_id = -1,
- .cmd_per_lun = 32,
+ .cmd_per_lun = 3,
.can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
.use_clustering = ENABLE_CLUSTERING,
.sg_tablesize = SG_ALL,
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index c0dc8e151c6..48de805eb19 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -2033,18 +2033,16 @@ EXPORT_SYMBOL(fc_eh_host_reset);
int fc_slave_alloc(struct scsi_device *sdev)
{
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
- int queue_depth;
if (!rport || fc_remote_port_chkready(rport))
return -ENXIO;
- if (sdev->tagged_supported) {
- if (sdev->host->hostt->cmd_per_lun)
- queue_depth = sdev->host->hostt->cmd_per_lun;
- else
- queue_depth = FC_FCP_DFLT_QUEUE_DEPTH;
- scsi_activate_tcq(sdev, queue_depth);
- }
+ if (sdev->tagged_supported)
+ scsi_activate_tcq(sdev, FC_FCP_DFLT_QUEUE_DEPTH);
+ else
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev),
+ FC_FCP_DFLT_QUEUE_DEPTH);
+
return 0;
}
EXPORT_SYMBOL(fc_slave_alloc);