intel: Clear virtual after failing to mmap_gtt.

Don't store the error return in bo_gem->gtt_virtual or else we will
attempt to use that as a valid pointer in future mappings.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c
index 5b76340..f3af3a9 100644 (file)
--- a/intel/intel_bufmgr_gem.c
+++ b/intel/intel_bufmgr_gem.c
@@ -950,6 +950,7 @@ int drm_intel_gem_bo_map_gtt(drm_intel_bo *bo)
                                           MAP_SHARED, bufmgr_gem->fd,
                                           mmap_arg.offset);
                if (bo_gem->gtt_virtual == MAP_FAILED) {
+                       bo_gem->gtt_virtual = NULL;
                        ret = -errno;
                        fprintf(stderr,
                                "%s:%d: Error mapping buffer %d (%s): %s .\n",