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Subject[PATCH 1/1] Use cachable mapping for i915 opregion.
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 <>
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;


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