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[SCSI] megaraid: Add support for change_queue_depth

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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>
This commit is contained in:
brking@charter.net 2006-07-05 17:00:01 -05:00 committed by James Bottomley
parent 64821324ca
commit f4c8aa1107
1 changed files with 16 additions and 0 deletions
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16
drivers/scsi/megaraid/megaraid_mbox.c
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@ -330,6 +330,21 @@ static struct device_attribute *megaraid_sdev_attrs[] = {
NULL, 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 * 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_device_reset_handler = megaraid_reset_handler,
.eh_bus_reset_handler = megaraid_reset_handler, .eh_bus_reset_handler = megaraid_reset_handler,
.eh_host_reset_handler = megaraid_reset_handler, .eh_host_reset_handler = megaraid_reset_handler,
.change_queue_depth = megaraid_change_queue_depth,
.use_clustering = ENABLE_CLUSTERING, .use_clustering = ENABLE_CLUSTERING,
.sdev_attrs = megaraid_sdev_attrs, .sdev_attrs = megaraid_sdev_attrs,
.shost_attrs = megaraid_shost_attrs, .shost_attrs = megaraid_shost_attrs,