Latest working kernel version: 2.6.27
Earliest failing kernel version: 2.6.28-rc2
There is no compat layer for CDROM ioctls. For whatever reason this worked anyway with <= 2.6.27, at least good enough for hal to correctly handle it (it uses at least CDROM_SET_OPTIONS, CDROM_GET_CAPABILITY and CDROM_DRIVE_STATUS).
Looking closer I found 33c2dca4957bd0da3e1af7b96d0758d97e708ef6 (trim file propagation in block/compat_ioctl.c) which removes the compat handling for some of the cdrom ioctls.
Handled-By : Andreas Schwab <email@example.com>
Do I understand correctly that commit 33c2dca4957bd0da3e1af7b96d0758d97e708ef6 caused the problem to happen?
First-Bad-Commit : 33c2dca4957bd0da3e1af7b96d0758d97e708ef6
Author: Al Viro <firstname.lastname@example.org>
Date: Fri Feb 22 22:02:50 2008 -0500
[PATCH] trim file propagation in block/compat_ioctl.c
... and remove the handling of cases when it falls back to native
without changing arguments.
Signed-off-by: Al Viro <email@example.com>
Looks good to me
Acked-by: Alan Cox <firstname.lastname@example.org>
Andreas - can you send Linus a copy of that directly ..
Merged as 1c925604e1038c7c65b91a92d14dc972b3a70a97.