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authoradam radford <aradford@gmail.com>2011-07-27 02:42:52 +0400
committerJames Bottomley <JBottomley@Parallels.com>2011-07-27 15:44:47 +0400
commit4bcde509a8fe664f2e688647d8427b6aedaa89b7 (patch)
treef4c7b0a8fade19647bc1d9f3799678d861d88b90 /drivers/scsi/megaraid
parentdb21b6f41bf5a9ce335ced4b5feaa0ad04327003 (diff)
downloadlinux-4bcde509a8fe664f2e688647d8427b6aedaa89b7.tar.xz
[SCSI] megaraid_sas: Add .change_queue_depth support
Signed-off-by: Adam Radford <aradford@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/megaraid')
-rw-r--r--drivers/scsi/megaraid/megaraid_sas_base.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 2d8cdce7b2f5..c71922040539 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -54,6 +54,7 @@
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
#include "megaraid_sas_fusion.h"
#include "megaraid_sas.h"
@@ -2057,6 +2058,20 @@ megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
}
}
+static int megasas_change_queue_depth(struct scsi_device *sdev,
+ int queue_depth, int reason)
+{
+ if (reason != SCSI_QDEPTH_DEFAULT)
+ return -EOPNOTSUPP;
+
+ if (queue_depth > sdev->host->can_queue)
+ queue_depth = sdev->host->can_queue;
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev),
+ queue_depth);
+
+ return queue_depth;
+}
+
/*
* Scsi host template for megaraid_sas driver
*/
@@ -2074,6 +2089,7 @@ static struct scsi_host_template megasas_template = {
.eh_timed_out = megasas_reset_timer,
.bios_param = megasas_bios_param,
.use_clustering = ENABLE_CLUSTERING,
+ .change_queue_depth = megasas_change_queue_depth,
};
/**