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SubjectRe: 2.6.25-rc8-git2: Reported regressions from 2.6.24


On Fri, 4 Apr 2008, Rafael J. Wysocki wrote:
>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=10390
> Subject : Oops while reading /proc/ioports or /proc/iomem
> Submitter : Jan Kara <jack@suse.cz>
> Date : 2008-04-03 15:25 (1 days old)
> References : http://lkml.org/lkml/2008/4/3/149

This sounds very much like some module registered IO ports/memory and was
then unloaded without unregistering them.

It's a bit hard to guess which module it is, though. The oops says "[last
unloaded: parport]", so that's likely to be the area.

So I *suspect* this patch might be relevant. Bug apparently introduced in
f63fd7e299ee13da071ecfce2b90b58c5e1562b1 ("parport_pc: detection for
SuperIO IT87XX POST") by Petr Cvek.

Petr?

Linus

---
drivers/parport/parport_pc.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index d76d37b..a858089 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -1568,9 +1568,8 @@ static void __devinit detect_and_report_it87(void)
outb(r | 8, 0x2F);
outb(0x02, 0x2E); /* Lock */
outb(0x02, 0x2F);
-
- release_region(0x2e, 1);
}
+ release_region(0x2e, 1);
}
#endif /* CONFIG_PARPORT_PC_SUPERIO */


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