linux-libre-{pae,xen}-3.18.2_gnu-2: updating version

1 files changed, 79 insertions, 0 deletions

diff --git a/kernels/linux-libre-pae/0001-drm-i915-Disallow-pin-ioctl-completely-for-kms-drive.patch b/kernels/linux-libre-pae/0001-drm-i915-Disallow-pin-ioctl-completely-for-kms-drive.patch
new file mode 100644
index 000000000..f9aa99342
--- /dev/null
+++ b/kernels/linux-libre-pae/0001-drm-i915-Disallow-pin-ioctl-completely-for-kms-drive.patch
@@ -0,0 +1,79 @@
+From d472fcc8379c062bd56a3876fc6ef22258f14a91 Mon Sep 17 00:00:00 2001
+From: Daniel Vetter <daniel.vetter@ffwll.ch>
+Date: Mon, 24 Nov 2014 11:12:42 +0100
+Subject: [PATCH] drm/i915: Disallow pin ioctl completely for kms drivers
+
+The problem here is that SNA pins batchbuffers to etch out a bit more
+performance. Iirc it started out as a w/a for i830M (which we've
+implemented in the kernel since a long time already). The problem is
+that the pin ioctl wasn't added in
+
+commit d23db88c3ab233daed18709e3a24d6c95344117f
+Author: Chris Wilson <chris@chris-wilson.co.uk>
+Date:   Fri May 23 08:48:08 2014 +0200
+
+    drm/i915: Prevent negative relocation deltas from wrapping
+
+Fix this by simply disallowing pinning from userspace so that the
+kernel is in full control of batch placement again. Especially since
+distros are moving towards running X as non-root, so most users won't
+even be able to see any benefits.
+
+UMS support is dead now, but we need this minimal patch for
+backporting. Follow-up patch will remove the pin ioctl code
+completely.
+
+Note to backporters: You must have both
+
+commit b45305fce5bb1abec263fcff9d81ebecd6306ede
+Author: Daniel Vetter <daniel.vetter@ffwll.ch>
+Date:   Mon Dec 17 16:21:27 2012 +0100
+
+    drm/i915: Implement workaround for broken CS tlb on i830/845
+
+which laned in 3.8 and
+
+commit c4d69da167fa967749aeb70bc0e94a457e5d00c1
+Author: Chris Wilson <chris@chris-wilson.co.uk>
+Date:   Mon Sep 8 14:25:41 2014 +0100
+
+    drm/i915: Evict CS TLBs between batches
+
+which is also marked cc: stable. Otherwise this could introduce a
+regression by disabling the userspace w/a without the kernel w/a being
+fully functional on i830/45.
+
+References: https://bugs.freedesktop.org/show_bug.cgi?id=76554#c116
+Cc: stable@vger.kernel.org # requires c4d69da167fa967749a and v3.8
+Cc: Chris Wilson <chris@chris-wilson.co.uk>
+Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
+---
+ drivers/gpu/drm/i915/i915_gem.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
+index fd17cca..97b86a5 100644
+--- a/drivers/gpu/drm/i915/i915_gem.c
++++ b/drivers/gpu/drm/i915/i915_gem.c
+@@ -4263,7 +4263,7 @@ i915_gem_pin_ioctl(struct drm_device *dev, void *data,
+ 	struct drm_i915_gem_object *obj;
+ 	int ret;
+ 
+-	if (INTEL_INFO(dev)->gen >= 6)
++	if (drm_core_check_feature(dev, DRIVER_MODESET))
+ 		return -ENODEV;
+ 
+ 	ret = i915_mutex_lock_interruptible(dev);
+@@ -4319,6 +4319,9 @@ i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
+ 	struct drm_i915_gem_object *obj;
+ 	int ret;
+ 
++	if (drm_core_check_feature(dev, DRIVER_MODESET))
++		return -ENODEV;
++
+ 	ret = i915_mutex_lock_interruptible(dev);
+ 	if (ret)
+ 		return ret;
+-- 
+2.2.0
+