glamor: Always return 0 from glamor_fds_from_pixmap on error

This matches what glamor_egl_fds_from_pixmap and dri3_fds_from_pixmap do
and what proc_dri3_buffers_from_pixmap expects.

Fixes: c8c276c9569b "glamor: Implement PixmapFromBuffers and
                     BuffersFromPixmap"
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/glamor/glamor.c b/glamor/glamor.c
index d984d20f3..e2c74d17a 100644
--- a/glamor/glamor.c
+++ b/glamor/glamor.c
@@ -836,20 +836,20 @@ glamor_fds_from_pixmap(ScreenPtr screen, PixmapPtr pixmap, int *fds,
         glamor_get_screen_private(pixmap->drawable.pScreen);
 
     if (!glamor_priv->dri3_enabled)
-        return -1;
+        return 0;
     switch (pixmap_priv->type) {
     case GLAMOR_TEXTURE_DRM:
     case GLAMOR_TEXTURE_ONLY:
         if (!glamor_pixmap_ensure_fbo(pixmap, pixmap->drawable.depth == 30 ?
                                       GL_RGB10_A2 : GL_RGBA, 0))
-            return -1;
+            return 0;
         return glamor_egl_fds_from_pixmap(screen, pixmap, fds,
                                           strides, offsets,
                                           modifier);
     default:
         break;
     }
-    return -1;
+    return 0;
 }
 
 _X_EXPORT int