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[2/2] drm/i915: Assume size & 1 means WO map (hack)

Message ID 1313110048-2971-3-git-send-email-ben@bwidawsk.net (mailing list archive)
State New, archived
Headers show

Commit Message

Ben Widawsky Aug. 12, 2011, 12:47 a.m. UTC 
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_gem.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a546a71..8e14fbe 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1156,6 +1156,11 @@  i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
 		return -E2BIG;
 	}
 
+	if (args->offset & 1) {
+		atomic_set(&(to_intel_bo(obj)->always_cpu_dirty), 1);
+		args->offset -= 1;
+	}
+
 	down_write(&current->mm->mmap_sem);
 	addr = do_mmap(obj->filp, 0, args->size,
 		       PROT_READ | PROT_WRITE, MAP_SHARED,