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[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>
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@ -330,6 +330,21 @@ static struct device_attribute *megaraid_sdev_attrs[] = {
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NULL,
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};
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/**
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* megaraid_change_queue_depth - Change the device's queue depth
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* @sdev: scsi device struct
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* @qdepth: depth to set
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*
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* Return value:
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* actual depth set
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**/
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static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth)
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{
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if (qdepth > MBOX_MAX_SCSI_CMDS)
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qdepth = MBOX_MAX_SCSI_CMDS;
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scsi_adjust_queue_depth(sdev, 0, qdepth);
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return sdev->queue_depth;
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}
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/*
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* Scsi host template for megaraid unified driver
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@ -343,6 +358,7 @@ static struct scsi_host_template megaraid_template_g = {
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.eh_device_reset_handler = megaraid_reset_handler,
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.eh_bus_reset_handler = megaraid_reset_handler,
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.eh_host_reset_handler = megaraid_reset_handler,
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.change_queue_depth = megaraid_change_queue_depth,
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.use_clustering = ENABLE_CLUSTERING,
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.sdev_attrs = megaraid_sdev_attrs,
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.shost_attrs = megaraid_shost_attrs,
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