Subject: Re: umass woe: sd0(umass0:0:0): readonly device & drive offline
To: Michael van Elst <email@example.com>
From: Hubert Feyrer <firstname.lastname@example.org>
Date: 11/20/2005 02:34:08
On Sat, 19 Nov 2005, Michael van Elst wrote:
> If you want to ignore the error, just return 0.
Ok, the patch below does this, and it gets my camera working.
Messages I get are:
1) nothing spectacular when booting without the camera (expected)
2) when plugging in the camera:
umass0 at uhub0 port 1 configuration 1 interface 0
umass0: DSC DIGITAL CAMERA USB, rev 1.00/1.00, addr 2
umass0: using ATAPI over Bulk-Only
atapibus0 at umass0: 2 targets
sd0 at atapibus0 drive 0: <DIGITAL, CAMERA, 1.00> disk removable
sd0(umass0:0:0): readonly device
sd0: drive offline
3) When accessing the camera (disklabel, mount, view files, ...):
sd0: fabricating a geometry
Other than the fact that the drive is neither readonly nor offline,
this works for me.
One thing I wonder is if the reply should be silently ignored (as it's
done right now), or if some error/warning/whatever should be printed.
I also have ZERO clue what other SCSI devices this patch may break - I
cannot test this on anything. Someone please review!
Where to go from there?
RCS file: /cvsroot/src/sys/dev/scsipi/sd.c,v
retrieving revision 188.8.131.52
diff -u -r184.108.40.206 sd.c
--- sd.c 11 Sep 2004 12:55:11 -0000 220.127.116.11
+++ sd.c 20 Nov 2005 01:26:26 -0000
@@ -1367,6 +1367,16 @@
int s, error, retval = EJUSTRETURN;
+ * Ignore errors from accessing illegal fields (e.g. trying to
+ * lock the door of a digicam, which doesn't have a door that
+ * can be locked)
+ if ((sense->flags & SSD_KEY) == SKEY_ILLEGAL_REQUEST &&
+ sense->add_sense_code == 0x24 &&
+ sense->add_sense_code_qual == 0x00) /* Illegal field in CDB */
+ return 0;
* If the periph is already recovering, just do the normal
* error processing.