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authorbrking@charter.net <brking@charter.net>2006-07-05 17:00:01 -0500
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-07-28 13:48:14 -0500
commitf4c8aa1107969c26b1984eb2996a58f816dea71f (patch)
tree7929bd06154bcfedd8de71674567018685174d45
parent64821324ca49f24be1a66f2f432108f96a24e596 (diff)
[SCSI] megaraid: Add support for change_queue_depth
Adds support for change_queue_depth so that device queue depth can be changed at runtime through sysfs. Signed-off-by: <brking@charter.net> Acked-by: Seokmann Ju <seokmann.ju@lsil.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
-rw-r--r--drivers/scsi/megaraid/megaraid_mbox.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
index 92715130ac0..7ae580f17e6 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.c
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -330,6 +330,21 @@ static struct device_attribute *megaraid_sdev_attrs[] = {
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 megaraid_template_g = {
.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,