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New: sr_mod: CDROM_DRIVE_STATUS ioctl causes tray to be closed

Bug 11803 [email protected] 2 participants 3 messages Oct 21, 2008 – Oct 22, 2008 SCSI

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http://bugzilla.kernel.org/show_bug.cgi?id=11803

Summary: sr_mod: CDROM_DRIVE_STATUS ioctl causes tray to be
closed
Product: SCSI Drivers
Version: 2.5
KernelVersion: 2.6.27-2
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]

Latest working kernel version: 2.6.24 (maybe later)
Earliest failing kernel version: 2.6.27 (maybe earlier)
Distribution: Ubuntu 8.10
Hardware Environment:
- standard ATAPI CD-ROM drive which works through sr_mod (e. g. PIONEER DVD-RW
DVR-212)
- not using IDE drivers, but libata and pata (PATA_AMD in my case)
Software Environment:
- single user mode
Problem Description:

As reported in https://launchpad.net/bugs/283316 and a couple of duplicates, CD-ROM drives which are opened/ejected immediately close again. This is due to hal polling the device every 2 seconds for an inserted medium for automounting.

The reason is that the CDROM_DRIVE_STATUS ioctl now causes an open CD tray to get closed, instead of just returning CDS_TRAY_OPEN and leaving the tray alone (as in earlier kernel releases).

Unfortunately I cannot precisely tell at which kernel version it regressed, since the CD drive of my workstation doesn't support mechanical closing (one of those external Dell drives).

I built a minimal upstream 2.7.27.2 vanilla kernel with just enough PATA_AMD and SCSI stuff to boot and reproduce this. Given the reported duplicates, it is not specific to a CD ROM drive model or architecture (I reproduced it on x86_64, many reporters are on i386).

IANAKD, but a cursory glance at
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=history;f=drivers/scsi/sr_ioctl.c
revealed that there weren't any changes since about 2.6.24 (where it still worked fine). So I'm afraid I'm lost where to look.

Steps to reproduce:
- Open CD tray (CD drive must support mechanical closing)
- perl -e 'open F, "/dev/scd0"; ioctl (F, 0x5326, 0x7fffffff);'

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#1 lore raw

[Bug 11803] sr_mod: CDROM_DRIVE_STATUS ioctl causes tray to be closed

http://bugzilla.kernel.org/show_bug.cgi?id=11803

[email protected] changed:

What |Removed |Added
----------------------------------------------------------------------------

         AssignedTo|scsi_drivers-other@kernel-  |[email protected]
                   |bugs.osdl.org               |
             Status|NEW                         |ASSIGNED

------- Comment #1 from [email protected] 2008-10-21 18:50 ------- Does the kernel whine about anything after that?

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In reply to [email protected]
Quoted 46 lines · On Tue, 2008-10-21 at 15:37 -0700, [email protected] wrote:

http://bugzilla.kernel.org/show_bug.cgi?id=11803

Summary: sr_mod: CDROM_DRIVE_STATUS ioctl causes tray to be
closed
Product: SCSI Drivers
Version: 2.5
KernelVersion: 2.6.27-2
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]

Latest working kernel version: 2.6.24 (maybe later)
Earliest failing kernel version: 2.6.27 (maybe earlier)
Distribution: Ubuntu 8.10
Hardware Environment:
- standard ATAPI CD-ROM drive which works through sr_mod (e. g. PIONEER DVD-RW
DVR-212)
- not using IDE drivers, but libata and pata (PATA_AMD in my case)
Software Environment:
- single user mode
Problem Description:

As reported in https://launchpad.net/bugs/283316 and a couple of duplicates, CD-ROM drives which are opened/ejected immediately close again. This is due to hal polling the device every 2 seconds for an inserted medium for automounting.

The reason is that the CDROM_DRIVE_STATUS ioctl now causes an open CD tray to get closed, instead of just returning CDS_TRAY_OPEN and leaving the tray alone (as in earlier kernel releases).

Unfortunately I cannot precisely tell at which kernel version it regressed, since the CD drive of my workstation doesn't support mechanical closing (one of those external Dell drives).

I built a minimal upstream 2.7.27.2 vanilla kernel with just enough PATA_AMD and SCSI stuff to boot and reproduce this. Given the reported duplicates, it is not specific to a CD ROM drive model or architecture (I reproduced it on x86_64, many reporters are on i386).

Quoted 8 lines

IANAKD, but a cursory glance at
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=history;f=drivers/scsi/sr_ioctl.c
revealed that there weren't any changes since about 2.6.24 (where it still worked fine). So I'm afraid I'm lost where to look.

Steps to reproduce:
- Open CD tray (CD drive must support mechanical closing)
- perl -e 'open F, "/dev/scd0"; ioctl (F, 0x5326, 0x7fffffff);'

I'd finger this commit:

commit 210ba1d1724f5c4ed87a2ab1a21ca861a915f734

Author: James Bottomley <[email protected]>
Date:   Sat Jan 5 10:39:51 2008 -0600

[SCSI] sr: update to follow tray status correctly

It's actually a gentoo patch trying to make tray status report with finer detail. Can you revert it and see if the problem goes away?

Thanks,

James