Adds support for change_queue_depth so that device
queue depth can be changed at runtime through sysfs.
Signed-off-by: <brking@xxxxxxxxxxx>
---
diff -puN drivers/scsi/megaraid/megaraid_mbox.c~megaraid_change_queue_depth drivers/scsi/megaraid/megaraid_mbox.c
--- linux-2.6/drivers/scsi/megaraid/megaraid_mbox.c~megaraid_change_queue_depth 2006-07-05 14:00:04.000000000 -0500
+++ linux-2.6-brking/drivers/scsi/megaraid/megaraid_mbox.c 2006-07-05 16:53:36.000000000 -0500
@@ -330,6 +330,21 @@ static struct device_attribute *megaraid
NULL,
};
+/**
+ * megaraid_change_queue_depth - Change the device's queue depth
+ * @sdev: scsi device struct
+ * @qdepth: depth to set
+ *
+ * Return value:
+ * actual depth set
+ **/
+static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth)
+{
+ if (qdepth > MBOX_MAX_SCSI_CMDS)
+ qdepth = MBOX_MAX_SCSI_CMDS;
+ scsi_adjust_queue_depth(sdev, 0, qdepth);
+ return sdev->queue_depth;
+}
/*
* Scsi host template for megaraid unified driver
@@ -343,6 +358,7 @@ static struct scsi_host_template megarai
.eh_device_reset_handler = megaraid_reset_handler,
.eh_bus_reset_handler = megaraid_reset_handler,
.eh_host_reset_handler = megaraid_reset_handler,
+ .change_queue_depth = megaraid_change_queue_depth,
.use_clustering = ENABLE_CLUSTERING,
.sdev_attrs = megaraid_sdev_attrs,
.shost_attrs = megaraid_shost_attrs,
_
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