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authorbrking@charter.net <brking@charter.net>2006-07-05 18:00:01 -0400
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-07-28 14:48:14 -0400
commitf4c8aa1107969c26b1984eb2996a58f816dea71f (patch)
tree7929bd06154bcfedd8de71674567018685174d45 /drivers/scsi
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>
Diffstat (limited to 'drivers/scsi')
-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 92715130ac09..7ae580f17e64 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[] = {
330 NULL, 330 NULL,
331}; 331};
332 332
333/**
334 * megaraid_change_queue_depth - Change the device's queue depth
335 * @sdev: scsi device struct
336 * @qdepth: depth to set
337 *
338 * Return value:
339 * actual depth set
340 **/
341static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth)
342{
343 if (qdepth > MBOX_MAX_SCSI_CMDS)
344 qdepth = MBOX_MAX_SCSI_CMDS;
345 scsi_adjust_queue_depth(sdev, 0, qdepth);
346 return sdev->queue_depth;
347}
333 348
334/* 349/*
335 * Scsi host template for megaraid unified driver 350 * Scsi host template for megaraid unified driver
@@ -343,6 +358,7 @@ static struct scsi_host_template megaraid_template_g = {
343 .eh_device_reset_handler = megaraid_reset_handler, 358 .eh_device_reset_handler = megaraid_reset_handler,
344 .eh_bus_reset_handler = megaraid_reset_handler, 359 .eh_bus_reset_handler = megaraid_reset_handler,
345 .eh_host_reset_handler = megaraid_reset_handler, 360 .eh_host_reset_handler = megaraid_reset_handler,
361 .change_queue_depth = megaraid_change_queue_depth,
346 .use_clustering = ENABLE_CLUSTERING, 362 .use_clustering = ENABLE_CLUSTERING,
347 .sdev_attrs = megaraid_sdev_attrs, 363 .sdev_attrs = megaraid_sdev_attrs,
348 .shost_attrs = megaraid_shost_attrs, 364 .shost_attrs = megaraid_shost_attrs,