drm/radeon/kms: avoid corner case issue with unmappable vram V2

[net-next-2.6.git] / drivers / gpu / drm / radeon / r600.c

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index ddc3adea1dda4155374b2de956af7f88fd280404..ba05d3e7d1454b2a78ac28cc31531942a40770d6 100644 (file)
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -1248,6 +1248,7 @@ int r600_mc_init(struct radeon_device *rdev)
        rdev->mc.mc_vram_size = RREG32(CONFIG_MEMSIZE);
        rdev->mc.real_vram_size = RREG32(CONFIG_MEMSIZE);
        rdev->mc.visible_vram_size = rdev->mc.aper_size;
+       rdev->mc.active_vram_size = rdev->mc.visible_vram_size;
        r600_vram_gtt_location(rdev, &rdev->mc);
 
        if (rdev->flags & RADEON_IS_IGP) {
@@ -1917,6 +1918,7 @@ void r600_pciep_wreg(struct radeon_device *rdev, u32 reg, u32 v)
  */
 void r600_cp_stop(struct radeon_device *rdev)
 {
+       rdev->mc.active_vram_size = rdev->mc.visible_vram_size;
        WREG32(R_0086D8_CP_ME_CNTL, S_0086D8_CP_ME_HALT(1));
 }
 
@@ -3528,7 +3530,8 @@ void r600_ioctl_wait_idle(struct radeon_device *rdev, struct radeon_bo *bo)
        /* r7xx hw bug.  write to HDP_DEBUG1 followed by fb read
         * rather than write to HDP_REG_COHERENCY_FLUSH_CNTL
         */
-       if ((rdev->family >= CHIP_RV770) && (rdev->family <= CHIP_RV740)) {
+       if ((rdev->family >= CHIP_RV770) && (rdev->family <= CHIP_RV740) &&
+           rdev->vram_scratch.ptr) {
                void __iomem *ptr = (void *)rdev->vram_scratch.ptr;
                u32 tmp;