diff --git a/src/gallium/auxiliary/util/u_threaded_context.c b/src/gallium/auxiliary/util/u_threaded_context.c
index 87f75416f05..daab30f9fa8 100644
--- a/src/gallium/auxiliary/util/u_threaded_context.c
+++ b/src/gallium/auxiliary/util/u_threaded_context.c
@@ -2182,15 +2182,10 @@ tc_buffer_map(struct pipe_context *_pipe,
          tres->cpu_storage = align_malloc(resource->width0, tc->map_buffer_alignment);
 
       if (tres->cpu_storage) {
-         struct threaded_transfer *ttrans = slab_alloc(&tc->pool_transfers);
+         struct threaded_transfer *ttrans = slab_zalloc(&tc->pool_transfers);
          ttrans->b.resource = resource;
-         ttrans->b.level = 0;
          ttrans->b.usage = usage;
          ttrans->b.box = *box;
-         ttrans->b.stride = 0;
-         ttrans->b.layer_stride = 0;
-         ttrans->b.offset = 0;
-         ttrans->staging = NULL;
          ttrans->valid_buffer_range = &tres->valid_buffer_range;
          ttrans->cpu_storage_mapped = true;
          *transfer = &ttrans->b;
@@ -2205,11 +2200,9 @@ tc_buffer_map(struct pipe_context *_pipe,
     * only get resource_copy_region.
     */
    if (usage & PIPE_MAP_DISCARD_RANGE) {
-      struct threaded_transfer *ttrans = slab_alloc(&tc->pool_transfers);
+      struct threaded_transfer *ttrans = slab_zalloc(&tc->pool_transfers);
       uint8_t *map;
 
-      ttrans->staging = NULL;
-
       u_upload_alloc(tc->base.stream_uploader, 0,
                      box->width + (box->x % tc->map_buffer_alignment),
                      tc->map_buffer_alignment, &ttrans->b.offset,
diff --git a/src/gallium/drivers/radeonsi/ci/radeonsi-stoney-flakes.txt b/src/gallium/drivers/radeonsi/ci/radeonsi-stoney-flakes.txt
deleted file mode 100644
index 432600bb4eb..00000000000
--- a/src/gallium/drivers/radeonsi/ci/radeonsi-stoney-flakes.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-dEQP-GLES3.functional.buffer.map.write.explicit_flush.pixel_unpack_all
-dEQP-GLES3.functional.buffer.map.write.explicit_flush.pixel_unpack_partial
-dEQP-GLES3.functional.buffer.map.write.explicit_flush.transform_feedback_partial
-dEQP-GLES3.functional.buffer.map.write.explicit_flush.uniform_all
-dEQP-GLES3.functional.buffer.map.write.explicit_flush.transform_feedback_all
-
-# sometimes passes?
-spec@egl_chromium_sync_control@conformance
-spec@egl_chromium_sync_control@conformance@eglGetSyncValuesCHROMIUM_msc_and_sbc_test