From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugme-daemon@bugzilla.kernel.org
Subject: [Bug 11803] New: sr_mod: CDROM_DRIVE_STATUS ioctl causes tray to be closed
Date: Tue, 21 Oct 2008 15:37:43 -0700 (PDT)
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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: scsi_drivers-other@kernel-bugs.osdl.org
ReportedBy: martin.pitt@ubuntu.com
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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