--- drivers/gpu/drm/radeon/radeon_state.c

+++ drivers/gpu/drm/radeon/radeon_state.c

@@ -101,6 +101,7 @@ static __inline__ int radeon_check_and_f

DRM_ERROR("Invalid depth buffer offset\n");

return -EINVAL;

}

+ dev_priv->have_z_offset = 1;

break;

case RADEON_EMIT_PP_CNTL:

@@ -876,6 +877,12 @@ static void radeon_cp_dispatch_clear(str

if (tmp & RADEON_BACK)

flags |= RADEON_FRONT;

}

+ if (flags & (RADEON_DEPTH|RADEON_STENCIL)) {

+ if (!dev_priv->have_z_offset) {

+ printk_once(KERN_ERR "radeon: illegal depth clear request. Buggy mesa detected - please update.\n");

+ flags &= ~(RADEON_DEPTH | RADEON_STENCIL);

+ }

+ }

if (flags & (RADEON_FRONT | RADEON_BACK)) {