[PATCH] Fix gl draw command called without scanout

[Frediano Ziglio <fziglio@xxxxxxxxxx>]

This happens during VM shutdown.
Qemu should never send a draw command without scanout.
This should be fixed in Qemu  or in Virgl driver.

Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
---
 server/red-qxl.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/server/red-qxl.c b/server/red-qxl.c
index b84ae69..2a4fa52 100644
--- a/server/red-qxl.c
+++ b/server/red-qxl.c
@@ -905,7 +905,11 @@ void spice_qxl_gl_draw_async(QXLInstance *qxl,
 
     spice_return_if_fail(qxl != NULL);
     qxl_state = qxl->st;
-    spice_return_if_fail(qxl_state->scanout.drm_dma_buf_fd != -1);
+    if (qxl_state->scanout.drm_dma_buf_fd == -1) {
+        spice_warning("called spice_qxl_gl_draw_async without a buffer");
+        red_qxl_async_complete(qxl, async_command_alloc(qxl_state, message, cookie));
+        return;
+    }
     spice_return_if_fail(qxl_state->gl_draw_async == NULL);
 
     qxl_state->gl_draw_async = async_command_alloc(qxl_state, message, cookie);
-- 
2.7.4

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