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[PATCH] smbus unhiding kills thermal management

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Do not enable the SMBus device on Asus boards if suspend is used.  We do
not reenable the device on resume, leading to all sorts of undesirable
effects, the worst being a total fan failure after resume on Samsung P35
laptop.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Signed-off-by: Pavel Machek <pavel@suse.cz>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Carl-Daniel Hailfinger 2006-05-15 09:44:33 -07:00 committed by Linus Torvalds
parent eee391a66d
commit ce007ea597
1 changed files with 8 additions and 1 deletions
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9
drivers/pci/quirks.c
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@ -902,6 +902,7 @@ static void __init k8t_sound_hostbridge(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, k8t_sound_hostbridge);
#ifndef CONFIG_ACPI_SLEEP
/*
* On ASUS P4B boards, the SMBus PCI Device within the ICH2/4 southbridge
* is not activated. The myth is that Asus said that they do not want the
@ -913,8 +914,12 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, k8t_sound_ho
* bridge. Unfortunately, this device has no subvendor/subdevice ID. So it
* becomes necessary to do this tweak in two steps -- I've chosen the Host
* bridge as trigger.
*
* Actually, leaving it unhidden and not redoing the quirk over suspend2ram
* will cause thermal management to break down, and causing machine to
* overheat.
*/
static int __initdata asus_hides_smbus = 0;
static int __initdata asus_hides_smbus;
static void __init asus_hides_smbus_hostbridge(struct pci_dev *dev)
{
@ -1057,6 +1062,8 @@ static void __init asus_hides_smbus_lpc_ich6(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_hides_smbus_lpc_ich6 );
#endif
/*
* SiS 96x south bridge: BIOS typically hides SMBus device...
*/