From: Jens Rottmann <JRottmann@LiPPERTEmbedded.de>
Date: Mon, 22 Jun 2009 15:51:49 +0000 (+0100)
Subject: parport_pc: after superio probing restore original register values
X-Git-Tag: v2.6.31-rc1~81
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e2434dc1c19412639dd047a4d4eff8ed0e5d0d50;p=pandora-kernel.git

parport_pc: after superio probing restore original register values

CONFIG_PARPORT_PC_SUPERIO probes for various superio chips by writing
byte sequences to a set of different potential I/O ranges.  But the
probed ranges are not exclusive to parallel ports.  Some of our boards
just happen to have a watchdog in one of them.  Took us almost a week
to figure out why some distros reboot without warning after running
flawlessly for 3 hours.  For exactly 170 = 0xAA minutes, that is ...

Fixed by restoring original values after probing.  Also fixed too small
request_region() in detect_and_report_it87().

Signed-off-by: Jens Rottmann <JRottmann@LiPPERTEmbedded.de>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: <stable@kernel.org>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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