The opregion is a shared memory region between ACPI and the graphics driver. As the ACPI mapping has been changed to cachable in commit 6d5bbf00d251cc73223a71422d69e069dc2e0b8d, mapping the intel opregion non-cachable now fails. As no bus-master hardware is involved in the opregion, cachable map should do no harm. Tested on a Fujitsu Lifebook P8010. Signed-off-by: Michael Karcher <kernel@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/intel_opregion.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index f295a7a..dfaccd5 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -476,7 +476,7 @@ int intel_opregion_setup(struct drm_device *dev) return -ENOTSUPP; } - base = ioremap(asls, OPREGION_SIZE); + base = ioremap_cache(asls, OPREGION_SIZE); if (!base) return -ENOMEM; -- 1.7.2.3 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
