On Tue, Jul 09, 2013 at 04:00:31PM -0700, Guenter Roeck wrote:
This patch partially reverts commit 36ec8f877481449bdfa072e6adf2060869e2b970 for IvyBridge CPUs.
The original commit results in repeated 'Timed out waiting for forcewake old ack to clear' messages on a Supermicro C7H61 board (BIOS version 2.00 and 2.00b) with i7-3770K CPU. It ultimately results in a hangup if the system is highly loaded. Reverting the commit for IvyBridge CPUs fixes the issue.
Issue a warning if the CPU is IvyBridge and mt forcewake is disabled, since this condition can result in secondary issues.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=60541 Cc: Jesse Barnes jbarnes@virtuousgeek.org Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: Mika Kuoppala mika.kuoppala@intel.com Signed-off-by: Guenter Roeck linux@roeck-us.net
Picked up for -fixes, thanks for the patch. -Daniel