Hi, Wednesday, July 05, 2006 6:00 PM, brking wrote: > Adds support for change_queue_depth so that device > queue depth can be changed at runtime through sysfs. Can you share any reason to have queue depth chanaged at runtime? It is set with MBOX_MAX_SCSI_CMDS at driver attach. Thank you, Seokmann > -----Original Message----- > From: brking@xxxxxxxxxxx [mailto:brking@xxxxxxxxxxx] > Sent: Wednesday, July 05, 2006 6:00 PM > To: Kolli, Neela > Cc: Ju, Seokmann; linux-scsi@xxxxxxxxxxxxxxx; brking@xxxxxxxxxxx > Subject: [patch 1/1] 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@xxxxxxxxxxx> > --- > > > diff -puN > drivers/scsi/megaraid/megaraid_mbox.c~megaraid_change_queue_de > pth drivers/scsi/megaraid/megaraid_mbox.c > --- > linux-2.6/drivers/scsi/megaraid/megaraid_mbox.c~megaraid_chang > e_queue_depth 2006-07-05 14:00:04.000000000 -0500 > +++ linux-2.6-brking/drivers/scsi/megaraid/megaraid_mbox.c > 2006-07-05 16:53:36.000000000 -0500 > @@ -330,6 +330,21 @@ static struct device_attribute *megaraid > 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 megarai > .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, > _ > - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
