drm/radeon/kms: fix r6xx/7xx 1D tiling CS checker v2

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / radeon / r600_cs.c

diff --git a/drivers/gpu/drm/radeon/r600_cs.c b/drivers/gpu/drm/radeon/r600_cs.c
index 41802915f93f36854ea347cf6ee0021c2ab479f7..7b294c127c5ff7c5000174390bb600767870eff5 100644 (file)
--- a/drivers/gpu/drm/radeon/r600_cs.c
+++ b/drivers/gpu/drm/radeon/r600_cs.c
@@ -215,6 +215,9 @@ static inline int r600_cs_track_validate_cb(struct radeon_cs_parser *p, int i)
                                 __func__, __LINE__, pitch);
                        return -EINVAL;
                }
+               /* avoid breaking userspace */
+               if (height > 7)
+                       height &= ~0x7;
                if (!IS_ALIGNED(height, 8)) {
                        dev_warn(p->dev, "%s:%d cb height (%d) invalid\n",
                                 __func__, __LINE__, height);