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authorAndiry Xu <andiry.xu@amd.com>2008-11-14 11:42:29 +0800
committerGreg Kroah-Hartman <gregkh@kvm.kroah.org>2008-11-19 22:01:34 -0800
commitb09bc6cbae4dd3a2d35722668ef2c502a7b8b093 (patch)
tree42f8cf6ffda40b89ae7035517aa21247067886d0 /drivers/usb/musb
parentee2f6cc7f9ea2542ad46070ed62ba7aa04d08871 (diff)
USB: fix SB700 usb subsystem hang bug
This patch is required for AMD SB700 south bridge revision A12 and A13 to avoid USB subsystem hang symptom. The USB subsystem hang symptom is observed when the system has multiple USB devices connected to it. In some cases a USB hub may be required to observe this symptom. This patch works around the problem by correcting the internal register setting that will help by changing the behavior of the internal logic to avoid the USB subsystem hang issue. The change in the behavior of the logic does not impact the normal operation of the USB subsystem. Reported-by: Volker Armin Hemmann <volker.armin.hemmann@tu-clausthal.de> Tested-by: Volker Armin Hemmann <volker.armin.hemmann@tu-clausthal.de> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Libin Yang <libin.yang@amd.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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