From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 18 Feb 2011 17:51:10 +0000 (+0000)
Subject: i965: Fallback on encountering a NULL render buffer
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=13bab58f04c1ec6d0d52760eab490a0997d9abe2;p=mesa.git

i965: Fallback on encountering a NULL render buffer

Following a GPU hang, or other error, the render target is not likely to
have an allocated BO and so we must fallback to avoid using it.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=32534
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---

diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index c931df3c605..601bbc7b1a0 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -536,6 +536,11 @@ prepare_wm_surfaces(struct brw_context *brw)
 	 struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 	 struct intel_region *region = irb ? irb->region : NULL;
 
+	 if (region == NULL || region->buffer == NULL) {
+	    brw->intel.Fallback = GL_TRUE; /* boolean, not bitfield */
+	    return;
+	 }
+
 	 brw_add_validated_bo(brw, region->buffer);
 	 nr_surfaces = SURF_INDEX_DRAW(i) + 1;
       }