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authorAlex Deucher <alexdeucher@gmail.com>2010-12-03 14:37:22 -0500
committerDave Airlie <airlied@redhat.com>2010-12-08 09:35:05 +1000
commit8961d52d4cc52edf5672f8f2712c57162b736793 (patch)
treebb70f07b4b6097a2c71aada6570b3cd15a74dc09
parentdd7cc55a258400440aff5869d3e1e111142297cd (diff)
downloadop-kernel-dev-8961d52d4cc52edf5672f8f2712c57162b736793.zip
op-kernel-dev-8961d52d4cc52edf5672f8f2712c57162b736793.tar.gz
drm/radeon/kms: fix vram base calculation on rs780/rs880
Avoid overflowing a 32 bit value. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
-rw-r--r--drivers/gpu/drm/radeon/r600.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index a355259..a322d4f 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -1195,8 +1195,10 @@ void r600_vram_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc)
mc->vram_end, mc->real_vram_size >> 20);
} else {
u64 base = 0;
- if (rdev->flags & RADEON_IS_IGP)
- base = (RREG32(MC_VM_FB_LOCATION) & 0xFFFF) << 24;
+ if (rdev->flags & RADEON_IS_IGP) {
+ base = RREG32(MC_VM_FB_LOCATION) & 0xFFFF;
+ base <<= 24;
+ }
radeon_vram_location(rdev, &rdev->mc, base);
rdev->mc.gtt_base_align = 0;
radeon_gtt_location(rdev, mc);
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