intel_idle: PCI quirk to prevent Lenovo Ideapad s10-3 boot hang
commit00f8646ef207c509072889c922d180cd28c923b9
authorLen Brown <len.brown@intel.com>
Sat, 25 Sep 2010 01:02:27 +0000 (24 21:02 -0400)
committerGreg Kroah-Hartman <gregkh@suse.de>
Fri, 29 Oct 2010 04:51:42 +0000 (28 21:51 -0700)
tree64d20d1c9e9268f63152ec70f66ab7596d4029c2
parente5668aa876cbfb73277a5d7272e96eef30ede0d5
intel_idle: PCI quirk to prevent Lenovo Ideapad s10-3 boot hang

commit 4731fdcf6f7bdab3e369a3f844d4ea4d4017284d upstream.

When the Lenovo Ideapad S10-3 is booted with HT enabled,
it hits a boot hang in the intel_idle driver.

This occurs when entering ATM-C4 for the first time,
unless BM_STS is first cleared.

acpi_idle doesn't see this because it first checks
and clears BM_STS, but it would hit the same hang
if that check were disabled.

http://bugs.meego.com/show_bug.cgi?id=7093
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/634702

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/pci/quirks.c