i965: Avoid null access in intelMakeCurrent()

separate two null checks connected with && to their own if branches.

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 5e2f175..ca389f8 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -985,13 +985,17 @@ intelMakeCurrent(__DRIcontext * driContextPriv,
       struct gl_context *ctx = &brw->ctx;
       struct gl_framebuffer *fb, *readFb;
 
-      if (driDrawPriv == NULL && driReadPriv == NULL) {
+      if (driDrawPriv == NULL) {
          fb = _mesa_get_incomplete_framebuffer();
-         readFb = _mesa_get_incomplete_framebuffer();
       } else {
          fb = driDrawPriv->driverPrivate;
-         readFb = driReadPriv->driverPrivate;
          driContextPriv->dri2.draw_stamp = driDrawPriv->dri2.stamp - 1;
+      }
+
+      if (driReadPriv == NULL) {
+         readFb = _mesa_get_incomplete_framebuffer();
+      } else {
+         readFb = driReadPriv->driverPrivate;
          driContextPriv->dri2.read_stamp = driReadPriv->dri2.stamp - 1;
       }