commit 76e3a19d0691bbfcc559ce77ab3004818fab8f22
author Martin Peschke <mpeschke@linux.vnet.ibm.com> Fri Jan 30 15:46:23 2009 +0100
committer James Bottomley <James.Bottomley@HansenPartnership.com> Tue Feb 10 11:15:17 2009 -0500
tree 6013a3ec01ea3f269280740346b98875c35a5478
parent c2f9e49f9bbfa2e111ab1e1628b96b560bae7cec

[SCSI] sg: fix device number in blktrace data

Hi,

we have run into an issue with blktrace being started for sg devices.
Please apply.

Thanks,
Martin

From: Martin Peschke <mpeschke@linux.vnet.ibm.com>

The device number denoting a generic SCSI devices (sg) in a blktrace
trace is broken; major and minor are always 0. It looks like
sdp->device->sdev_gendev.devt is not initialized properly.
The fix below uses other data to make up a valid device number,
similar to the way an sg device number is generated for sysfs output.

Reported-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>