gallium: fix TFP on gallium

This fixes an uninitialised value use in the dri2 st when doing TFP.

It uses the driContextPriv which isn't initialised at alloc time.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/dri/common/dri_context.h b/src/gallium/state_trackers/dri/common/dri_context.h
index 54e56c6499..b29e853383 100644
--- a/src/gallium/state_trackers/dri/common/dri_context.h
+++ b/src/gallium/state_trackers/dri/common/dri_context.h
@@ -65,6 +65,8 @@ struct dri_context
 static INLINE struct dri_context *
 dri_context(__DRIcontext * driContextPriv)
 {
+   if (!driContextPriv)
+     return NULL;
    return (struct dri_context *)driContextPriv->driverPrivate;
 }