From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: Justin Forbes <jmforbes@linuxtx.org>,
Zwane Mwaikambo <zwane@arm.linux.org.uk>,
"Theodore Ts'o" <tytso@mit.edu>,
Randy Dunlap <rdunlap@xenotime.net>,
Dave Jones <davej@redhat.com>,
Chuck Wolber <chuckw@quantumlinux.com>,
torvalds@osdl.org, akpm@osdl.org, alan@lxorguk.ukuu.org.uk,
Jean Delvare <khali@linux-fr.org>,
Greg Kroah-Hartman <gregkh@suse.de>
Subject: [patch 06/22] i2c-i801: Fix resume when PEC is used
Date: Thu, 20 Apr 2006 21:38:04 -0700 [thread overview]
Message-ID: <20060421043804.GG12846@kroah.com> (raw)
In-Reply-To: <20060421043706.GA12846@kroah.com>
[-- Attachment #1: i2c-i801-fix-resume-when-pec-is-used.patch --]
[-- Type: text/plain, Size: 1025 bytes --]
Fix for bug #6395:
Fail to resume on Tecra M2 with ADM1032 and Intel 82801DBM
The BIOS of the Tecra M2 doesn't like it when it has to reboot or
resume after the i2c-i801 driver has left the SMBus in PEC mode.
I have a more complete fix for 2.6.17 but the simple approach of
leaving the SMBus in non-PEC mode after every transaction should do
for -stable. That's what the i2c-i801 driver was doing up to 2.6.15
(inclusive).
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/i2c/busses/i2c-i801.c | 5 +++++
1 file changed, 5 insertions(+)
--- linux-2.6.16.9.orig/drivers/i2c/busses/i2c-i801.c
+++ linux-2.6.16.9/drivers/i2c/busses/i2c-i801.c
@@ -478,6 +478,11 @@ static s32 i801_access(struct i2c_adapte
ret = i801_transaction();
}
+ /* Some BIOSes don't like it when PEC is enabled at reboot or resume
+ time, so we forcibly disable it after every transaction. */
+ if (hwpec)
+ outb_p(0, SMBAUXCTL);
+
if(block)
return ret;
if(ret)
--
next prev parent reply other threads:[~2006-04-21 4:51 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060421043353.602539000@blue.kroah.org>
2006-04-21 4:37 ` [patch 00/22] 2.6.16-stable review cycle Greg KH
2006-04-21 4:37 ` [patch 01/22] 3ware: kmap_atomic() fix Greg KH
2006-04-21 4:37 ` [patch 02/22] 3ware 9000 disable local irqs during kmap_atomic Greg KH
2006-04-21 4:37 ` [patch 03/22] efficeon-agp: Add missing memory mask Greg KH
2006-04-21 4:37 ` [patch 04/22] : Fix truesize underflow Greg KH
2006-04-21 4:37 ` [patch 05/22] : Fix hotplug race during device registration Greg KH
2006-04-21 4:38 ` Greg KH [this message]
2006-04-21 4:38 ` [patch 07/22] MTD_NAND_SHARPSL and MTD_NAND_NANDSIM should be tristates Greg KH
2006-04-21 4:38 ` [patch 08/22] PPC: fix oops in alsa powermac driver Greg KH
2006-04-21 4:38 ` [patch 09/22] selinux: Fix MLS compatibility off-by-one bug Greg KH
2006-04-21 4:38 ` [patch 10/22] IPV6: Ensure to have hop-by-hop options in our header of &sk_buff Greg KH
2006-04-21 4:39 ` [patch 11/22] IPV6: XFRM: Dont use old copy of pointer after pskb_may_pull() Greg KH
2006-04-21 4:39 ` [patch 12/22] IPV6: XFRM: Fix decoding session with preceding extension header(s) Greg KH
2006-04-21 4:39 ` [patch 13/22] x86: dont allow tail-calls in sys_ftruncate() Greg KH
2006-04-21 4:39 ` [patch 18/22] Fix file lookup without ref Greg KH
2006-04-21 4:39 ` [patch 17/22] IPC: access to unmapped vmalloc area in grow_ary() Greg KH
2006-04-21 4:39 ` [patch 16/22] m41t00: fix bitmasks when writing to chip Greg KH
2006-04-21 4:39 ` [patch 15/22] Open IPMI BT overflow Greg KH
2006-04-21 4:39 ` [patch 14/22] x86: be careful about tailcall breakage for sys_opentoo Greg KH
2006-04-21 4:39 ` [patch 22/22] Add more prevent_tail_call() Greg KH
2006-04-21 4:39 ` [patch 21/22] alim15x3: ULI M-1573 south Bridge support Greg KH
2006-04-21 4:40 ` [patch 20/22] apm: fix Armada laptops again Greg KH
2006-04-21 4:40 ` [patch 19/22] fbdev: Fix return error of fb_write Greg KH
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