Patch "drm/radeon: fix user ptr race condition" has been added to the 4.1-stable tree

Patch "drm/radeon: fix user ptr race condition" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/radeon: fix user ptr race condition

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-radeon-fix-user-ptr-race-condition.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 12f1384da650bdb835fff63e66fe815ea882fc0e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Tue, 14 Jul 2015 15:58:30 +0200
Subject: drm/radeon: fix user ptr race condition
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>

commit 12f1384da650bdb835fff63e66fe815ea882fc0e upstream.

Port of amdgpu patch 9298e52f8b51d1e4acd68f502832f3a97f8cf892.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/radeon/radeon_gem.c    |    1 +
 drivers/gpu/drm/radeon/radeon_object.c |    1 -
 2 files changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -36,6 +36,7 @@ void radeon_gem_object_free(struct drm_g
 	if (robj) {
 		if (robj->gem_base.import_attach)
 			drm_prime_gem_destroy(&robj->gem_base, robj->tbo.sg);
+		radeon_mn_unregister(robj);
 		radeon_bo_unref(&robj);
 	}
 }
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -75,7 +75,6 @@ static void radeon_ttm_bo_destroy(struct
 	bo = container_of(tbo, struct radeon_bo, tbo);
 
 	radeon_update_memory_usage(bo, bo->tbo.mem.mem_type, -1);
-	radeon_mn_unregister(bo);
 
 	mutex_lock(&bo->rdev->gem.mutex);
 	list_del_init(&bo->list);


Patches currently in stable-queue which might be from christian.koenig@amd.com are

queue-4.1/drm-radeon-handle-irqs-only-based-on-irq-ring-not-irq-status-regs.patch
queue-4.1/drm-radeon-fix-hdp-flushing.patch
queue-4.1/drm-radeon-fix-user-ptr-race-condition.patch
queue-4.1/drm-radeon-compute-ring-fix-hibernation-ci-gpu-family-v2.patch
queue-4.1/drm-radeon-clean-up-reference-counting-and-pinning-of-the-cursor-bos.patch
queue-4.1/drm-radeon-unpin-cursor-bos-on-suspend-and-pin-them-again-on-resume-v2.patch
queue-4.1/drm-radeon-sdma-fix-hibernation-ci-gpu-family.patch
queue-4.1/drm-radeon-don-t-flush-the-gart-tlb-if-rdev-gart.ptr-null.patch