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authorKashyap, Desai <kashyap.desai@lsi.com>2010-11-13 04:39:11 +0530
committerJames Bottomley <James.Bottomley@suse.de>2010-12-21 12:24:07 -0600
commita93c6b45df57332b1703e0dc6f99a1bafc17f5e3 (patch)
tree2170abc929537a0542f7454a22da57428818ceea /drivers/scsi/mpt2sas
parent90d2a672250b9d6e5c700f2d2c07c19d6fad064a (diff)
[SCSI] mpt2sas: change queue depth with reason argument more appropriately
change_queue_depth callback API changed The change_queue_depth callback changed where there is now an additional parameter called reason, with SCSI_QDEPTH_DEFAULT, SCSI_QDEPTH_QFULL, and SCSI_QDEPTH_RAMP_UP codes. Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/mpt2sas')
-rw-r--r--drivers/scsi/mpt2sas/mpt2sas_scsih.c37
1 files changed, 26 insertions, 11 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index e4987dbbaa50..608e8ce6cc74 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -1102,28 +1102,24 @@ _scsih_build_scatter_gather(struct MPT2SAS_ADAPTER *ioc,
}
/**
- * _scsih_change_queue_depth - setting device queue depth
+ * _scsih_adjust_queue_depth - setting device queue depth
* @sdev: scsi device struct
* @qdepth: requested queue depth
- * @reason: calling context
*
- * Returns queue depth.
+ *
+ * Returns nothing
*/
-static int
-_scsih_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
+static void
+_scsih_adjust_queue_depth(struct scsi_device *sdev, int qdepth)
{
struct Scsi_Host *shost = sdev->host;
int max_depth;
- int tag_type;
struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
struct MPT2SAS_DEVICE *sas_device_priv_data;
struct MPT2SAS_TARGET *sas_target_priv_data;
struct _sas_device *sas_device;
unsigned long flags;
- if (reason != SCSI_QDEPTH_DEFAULT)
- return -EOPNOTSUPP;
-
max_depth = shost->can_queue;
/* limit max device queue for SATA to 32 */
@@ -1149,8 +1145,27 @@ _scsih_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
max_depth = 1;
if (qdepth > max_depth)
qdepth = max_depth;
- tag_type = (qdepth == 1) ? 0 : MSG_SIMPLE_TAG;
- scsi_adjust_queue_depth(sdev, tag_type, qdepth);
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
+}
+
+/**
+ * _scsih_change_queue_depth - setting device queue depth
+ * @sdev: scsi device struct
+ * @qdepth: requested queue depth
+ * @reason: SCSI_QDEPTH_DEFAULT/SCSI_QDEPTH_QFULL/SCSI_QDEPTH_RAMP_UP
+ * (see include/scsi/scsi_host.h for definition)
+ *
+ * Returns queue depth.
+ */
+static int
+_scsih_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
+{
+ if (reason == SCSI_QDEPTH_DEFAULT || reason == SCSI_QDEPTH_RAMP_UP)
+ _scsih_adjust_queue_depth(sdev, qdepth);
+ else if (reason == SCSI_QDEPTH_QFULL)
+ scsi_track_queue_full(sdev, qdepth);
+ else
+ return -EOPNOTSUPP;
if (sdev->inquiry_len > 7)
sdev_printk(KERN_INFO, sdev, "qdepth(%d), tagged(%d), "