From: Brian King Date: Tue, 29 May 2007 20:46:14 +0000 (-0500) Subject: [SCSI] ibmvscsi: Changeable queue depth X-Git-Tag: v2.6.23-rc1~1053^2~109 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=742d25b819f11dce91b89e6c9ac17402a119f20a;p=linux-2.6 [SCSI] ibmvscsi: Changeable queue depth Adds support for a changeable queue depth to ibmvscsi. Signed-off-by: Brian King Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index b10eefe735..b580af9595 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -1375,6 +1375,23 @@ static int ibmvscsi_slave_configure(struct scsi_device *sdev) return 0; } +/** + * ibmvscsi_change_queue_depth - Change the device's queue depth + * @sdev: scsi device struct + * @qdepth: depth to set + * + * Return value: + * actual depth set + **/ +static int ibmvscsi_change_queue_depth(struct scsi_device *sdev, int qdepth) +{ + if (qdepth > IBMVSCSI_MAX_CMDS_PER_LUN) + qdepth = IBMVSCSI_MAX_CMDS_PER_LUN; + + scsi_adjust_queue_depth(sdev, 0, qdepth); + return sdev->queue_depth; +} + /* ------------------------------------------------------------ * sysfs attributes */ @@ -1521,6 +1538,7 @@ static struct scsi_host_template driver_template = { .eh_abort_handler = ibmvscsi_eh_abort_handler, .eh_device_reset_handler = ibmvscsi_eh_device_reset_handler, .slave_configure = ibmvscsi_slave_configure, + .change_queue_depth = ibmvscsi_change_queue_depth, .cmd_per_lun = 16, .can_queue = IBMVSCSI_MAX_REQUESTS_DEFAULT, .this_id = -1, diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.h b/drivers/scsi/ibmvscsi/ibmvscsi.h index 77cc1d40f5..727ca7c959 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.h +++ b/drivers/scsi/ibmvscsi/ibmvscsi.h @@ -45,6 +45,7 @@ struct Scsi_Host; #define MAX_INDIRECT_BUFS 10 #define IBMVSCSI_MAX_REQUESTS_DEFAULT 100 +#define IBMVSCSI_MAX_CMDS_PER_LUN 64 /* ------------------------------------------------------------ * Data Structures