Revert "drm/radeon: Use write-combined CPU mappings of ring buffers with PCIe"

This reverts commit 1490434f0da63afc6006411c8829c6a7935a4e7e.

Several people have reported regressions with this patch on kabini.

diff --git a/drivers/gpu/drm/radeon/radeon_ring.c b/drivers/gpu/drm/radeon/radeon_ring.c
index 0678998..d656079 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_ring.c
+++ b/drivers/gpu/drm/radeon/radeon_ring.c
@@ -404,9 +404,7 @@ int radeon_ring_init(struct radeon_device *rdev, struct radeon_ring *ring, unsig
        /* Allocate ring buffer */
        if (ring->ring_obj == NULL) {
                r = radeon_bo_create(rdev, ring->ring_size, PAGE_SIZE, true,
-                                    RADEON_GEM_DOMAIN_GTT,
-                                    (rdev->flags & RADEON_IS_PCIE) ?
-                                    RADEON_GEM_GTT_WC : 0,
+                                    RADEON_GEM_DOMAIN_GTT, 0,
                                     NULL, &ring->ring_obj);
                if (r) {
                        dev_err(rdev->dev, "(%d) ring create failed\n", r);