[Mesa-stable] [PATCH v2] egl_dri2: set correct error code if swapbuffers fails

[Tapani Pälli]

From: Daniel Czarnowski <daniel.czarnowski at intel.com>

A return value of '-1' means that there was error during swap with a
window drawable, in this case we set error as EGL_BAD_NATIVE_WINDOW.

v2: coding style cleanup, better commit message

Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
Cc: "11.0 11.1" <mesa-stable at lists.freedesktop.org
---
 src/egl/drivers/dri2/platform_x11.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/egl/drivers/dri2/platform_x11.c b/src/egl/drivers/dri2/platform_x11.c
index 931ee51..420f567 100644
--- a/src/egl/drivers/dri2/platform_x11.c
+++ b/src/egl/drivers/dri2/platform_x11.c
@@ -872,7 +872,12 @@ dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 
    if (dri2_dpy->dri2) {
-      return dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
+      if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1) {
+          return EGL_TRUE;
+      }
+      /* Swap failed with a window drawable. */
+      _eglError(EGL_BAD_NATIVE_WINDOW, __FUNCTION__);
+      return EGL_FALSE;
    } else {
       assert(dri2_dpy->swrast);
 
-- 
2.5.0