[mesa/f20] i915: add a missing NULL pointer check (RHBZ #1100967)

[Igor Gnatenko]

commit 7878fa197ebb9343e3c871ee8354680299e3a3b2
Author: Igor Gnatenko <i.gnatenko.brain at gmail.com>
Date:   Wed May 28 22:56:26 2014 +0400

    i915: add a missing NULL pointer check (RHBZ #1100967)
    
    Signed-off-by: Igor Gnatenko <i.gnatenko.brain at gmail.com>

 0001-i915-add-a-missing-NULL-pointer-check.patch |   44 ++++++++++++++++++++++
 mesa.spec                                        |   11 +++++-
 2 files changed, 54 insertions(+), 1 deletions(-)
---
diff --git a/0001-i915-add-a-missing-NULL-pointer-check.patch b/0001-i915-add-a-missing-NULL-pointer-check.patch
new file mode 100644
index 0000000..ac11154
--- /dev/null
+++ b/0001-i915-add-a-missing-NULL-pointer-check.patch
@@ -0,0 +1,44 @@
+From 34fa604acfa3d9d66524eacaa239c3251dc3237b Mon Sep 17 00:00:00 2001
+From: Lubomir Rintel <lkundrak at v3.sk>
+Date: Wed, 28 May 2014 08:56:12 +0200
+Subject: [PATCH] i915: add a missing NULL pointer check
+
+mesaVisual can be NULL with configless context since this commit:
+
+    commit 551d459af421a2eb937e9e16301bb64da4624f89
+    Author: Neil Roberts <neil at linux.intel.com>
+    Date:   Fri Mar 7 18:05:47 2014 +0000
+
+    Add the EGL_MESA_configless_context extension
+...
+    Previously the i965 and i915 drivers were explicitly creating a zeroed visual
+    whenever 0 is passed for the EGLConfig.
+
+We attempt to dereference the visual in i915 and now we don't create a
+zeroed-out one one it crashes, breaking at least weston in an i915. There's
+no point in doing so as it would be zero anyway.
+
+Signed-off-by: Lubomir Rintel <lkundrak at v3.sk>
+Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1100967
+Cc: "10.2" <mesa-stable at lists.freedesktop.org>
+Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
+---
+ src/mesa/drivers/dri/i915/intel_context.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/mesa/drivers/dri/i915/intel_context.c b/src/mesa/drivers/dri/i915/intel_context.c
+index a6057d3..09fe371 100644
+--- a/src/mesa/drivers/dri/i915/intel_context.c
++++ b/src/mesa/drivers/dri/i915/intel_context.c
+@@ -507,7 +507,7 @@ intelInitContext(struct intel_context *intel,
+ 
+    _mesa_meta_init(ctx);
+ 
+-   intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
++   intel->hw_stencil = mesaVis && mesaVis->stencilBits && mesaVis->depthBits == 24;
+    intel->hw_stipple = 1;
+ 
+    intel->RenderIndex = ~0;
+-- 
+1.9.3
+
diff --git a/mesa.spec b/mesa.spec
index a4de400..01c505d 100644
--- a/mesa.spec
+++ b/mesa.spec
@@ -55,7 +55,7 @@
 Summary: Mesa graphics libraries
 Name: mesa
 Version: 10.1.4
-Release: 1.%{gitdate}%{?dist}
+Release: 2.%{gitdate}%{?dist}
 License: MIT
 Group: System Environment/Libraries
 URL: http://www.mesa3d.org
@@ -85,6 +85,10 @@ Patch99: 0001-opencl-use-versioned-.so-in-mesa.icd.patch
 
 Patch100: radeonsi-llvm-version-hack.patch
 
+# https://bugzilla.redhat.com/show_bug.cgi?id=1100967
+# http://lists.freedesktop.org/archives/mesa-dev/2014-May/060191.html
+Patch101: 0001-i915-add-a-missing-NULL-pointer-check.patch
+
 BuildRequires: pkgconfig autoconf automake libtool
 %if %{with_hardware}
 BuildRequires: kernel-headers
@@ -342,6 +346,8 @@ grep -q ^/ src/gallium/auxiliary/vl/vl_decoder.c && exit 1
 
 %patch100 -p1 -b .radeonsi
 
+%patch101 -p1 -b .old_intelInitContext
+
 %if 0%{with_private_llvm}
 sed -i 's/llvm-config/mesa-private-llvm-config-%{__isa_bits}/g' configure.ac
 sed -i 's/`$LLVM_CONFIG --version`/&-mesa/' configure.ac
@@ -645,6 +651,9 @@ rm -rf $RPM_BUILD_ROOT
 %endif
 
 %changelog
+* Wed May 28 2014 Igor Gnatenko <i.gnatenko.brain at gmail.com> - 10.1.4-2.20140521
+- i915: add a missing NULL pointer check (RHBZ #1100967)
+
 * Wed May 21 2014 Igor Gnatenko <i.gnatenko.brain at gmail.com> - 10.1.4-1.20140521
 - 10.1.4 upstream release