diff --git a/drivers/gpu/drm/xe/xe_lrc.c b/drivers/gpu/drm/xe/xe_lrc.c index a4292a11391d..78969d3e5904 100644 --- a/drivers/gpu/drm/xe/xe_lrc.c +++ b/drivers/gpu/drm/xe/xe_lrc.c @@ -1849,6 +1849,13 @@ void xe_lrc_write_ring(struct xe_lrc *lrc, const void *data, size_t size) __xe_lrc_write_ring(lrc, ring, &noop, sizeof(noop)); } + + /* + * The ring and the LRC context image are both WC, so the ring tail + * update which publishes these writes can become visible to the device + * first. Ensure the ring contents are visible before returning. + */ + xe_device_wmb(xe); } u64 xe_lrc_descriptor(struct xe_lrc *lrc)