[Nouveau] [Bug 88514] X segfaults when using prime offloading to nouveau card

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88514

--- Comment #12 from Chris Wilson <chris at chris-wilson.co.uk> ---
diff --git a/hw/xfree86/dri2/dri2.c b/hw/xfree86/dri2/dri2.c
index 8b94b8f..e048224 100644
--- a/hw/xfree86/dri2/dri2.c
+++ b/hw/xfree86/dri2/dri2.c
@@ -158,6 +158,9 @@ GetScreenPrime(ScreenPtr master, int prime_id)
         DRI2ScreenPtr ds;

         ds = DRI2GetScreen(slave);
+        if (ds == NULL)
+            continue;
+
         if (ds->prime_id == prime_id)
             return slave;
     }

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