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File U_cso-don-t-release-sampler-states-that-are-bound.patch of Package Mesa (Revision 4684a45cb92ba102908f5d1404ca122c)

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From: Marek Olšák <marek.olsak@amd.com>
Date: Fri Dec 2 15:39:25 2016 +0100
Subject: [PATCH]cso: don't release sampler states that are bound
Patch-mainline: 6dc96de303290e8d1fc294da478c4f370be98dea
Git-repo: git://anongit.freedesktop.org/mesa/mesa
Git-commit: 6dc96de303290e8d1fc294da478c4f370be98dea
References: boo#1015012 fdo#93649
Signed-off-by: Max Staudt <mstaudt@suse.de>

This fixes random radeonsi GPU hangs in Batman Arkham: Origins (Wine) and
probably many other games too.

cso_cache deletes sampler states when the cache size is too big and doesn't
check which sampler states are bound, causing use-after-free in drivers.
Because of that, radeonsi uploaded garbage sampler states and the hardware
went bananas. Other drivers may have experienced similar issues.

Cc: 12.0 13.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
---
 src/gallium/auxiliary/cso_cache/cso_cache.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/cso_cache/cso_cache.c b/src/gallium/auxiliary/cso_cache/cso_cache.c
index b240c93..1f3be4b 100644
--- a/src/gallium/auxiliary/cso_cache/cso_cache.c
+++ b/src/gallium/auxiliary/cso_cache/cso_cache.c
@@ -188,7 +188,9 @@ cso_insert_state(struct cso_cache *sc,
                  void *state)
 {
    struct cso_hash *hash = _cso_hash_for_type(sc, type);
-   sanitize_hash(sc, hash, type, sc->max_size);
+
+   if (type != CSO_SAMPLER)
+      sanitize_hash(sc, hash, type, sc->max_size);
 
    return cso_hash_insert(hash, hash_key, state);
 }

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