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xwayland: fix error path when modifier is not supported

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When the modifier is not supported by the compositor, and the
DMA-BUF contains multiple planes, xwl_pixmap->buffer is NULL.
Avoid crashing when calling wl_buffer_add_listener().

Signed-off-by: Simon Ser <contact@emersion.fr>
(cherry picked from commit 76a329e55c)
This commit is contained in:
Simon Ser 2023-02-27 14:41:37 +01:00 • committed by Olivier Fourdan
parent 29d75b092b
commit fd27fc3f22
1 changed files with 3 additions and 2 deletions
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5
hw/xwayland/xwayland-glamor-gbm.c
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@ -446,8 +446,9 @@ xwl_glamor_gbm_get_wl_buffer_for_pixmap(PixmapPtr pixmap)
close(prime_fds[i]);
/* Add our listener now */
wl_buffer_add_listener(xwl_pixmap->buffer,
&xwl_glamor_gbm_buffer_listener, pixmap);
if (xwl_pixmap->buffer)
wl_buffer_add_listener(xwl_pixmap->buffer,
&xwl_glamor_gbm_buffer_listener, pixmap);
return xwl_pixmap->buffer;
}