From: Shaohua Li <shaohua.li@intel.com>
Date: Tue, 19 May 2009 08:09:54 +0000 (+0800)
Subject: cpuidle: fix AMD C1E suspend hang
X-Git-Tag: v2.6.27.25~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4ec19648b3d8634cc4a08614a252c8739f76903c;p=pandora-kernel.git

cpuidle: fix AMD C1E suspend hang

commit 7d60e8ab0d5507229dfbdf456501cc378610fa01 upstream.

When AMD C1E is enabled, local APIC timer will stop even in C1. To avoid
suspend/resume hang, this patch removes C1 and replace it with a cpu_relax() in
suspend/resume path. This hasn't any impact in runtime path.

http://bugzilla.kernel.org/show_bug.cgi?id=13233

[ impact: avoid suspend/resume hang in AMD CPU with C1E enabled ]

Tested-by: Dmitry Lyzhyn <thisistempbox@yahoo.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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