drm/vmwgfx: Fix incorrect command header offset at restart

Sometimes it appears like the device modifies the command header offset
member. So explicitly clear it when restarting after an error.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c
index 847490b..c706ad3 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c
@@ -563,6 +563,7 @@ static void vmw_cmdbuf_work_func(struct work_struct *work)
                entry->cmd += new_start_offset;
                cb_hdr->length -= new_start_offset;
                cb_hdr->errorOffset = 0;
+               cb_hdr->offset = 0;
                list_add_tail(&entry->list, &restart_head[entry->cb_context]);
                man->ctx[entry->cb_context].block_submission = true;
        }