From 4fd3a8d6a5211c28594a544923d509b4d1001073 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Fri, 3 Dec 2010 14:37:22 -0500 Subject: [PATCH] drm/radeon/kms: fix vram base calculation on rs780/rs880 commit 8961d52d4cc52edf5672f8f2712c57162b736793 upstream. Avoid overflowing a 32 bit value. Signed-off-by: Alex Deucher Signed-off-by: Dave Airlie Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/r600.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c index bcff15375b08..74b9fb7a71df 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -1198,8 +1198,10 @@ 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); -- 2.34.1