diff options
Diffstat (limited to 'common/recipes-kernel/linux/files/0316-drm-amdgpu-Fix-race-condition-in-MMU-notifier-releas.patch')
| -rw-r--r-- | common/recipes-kernel/linux/files/0316-drm-amdgpu-Fix-race-condition-in-MMU-notifier-releas.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/files/0316-drm-amdgpu-Fix-race-condition-in-MMU-notifier-releas.patch b/common/recipes-kernel/linux/files/0316-drm-amdgpu-Fix-race-condition-in-MMU-notifier-releas.patch new file mode 100644 index 00000000..78cdd951 --- /dev/null +++ b/common/recipes-kernel/linux/files/0316-drm-amdgpu-Fix-race-condition-in-MMU-notifier-releas.patch @@ -0,0 +1,36 @@ +From 0c670ebe392faae5c1ddf407d8b9631126bd1094 Mon Sep 17 00:00:00 2001 +From: Felix Kuehling <Felix.Kuehling@amd.com> +Date: Thu, 14 Jan 2016 00:35:08 -0500 +Subject: [PATCH 0316/1110] drm/amdgpu: Fix race condition in MMU notifier + release +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The release notifier can get called a second time from +mmu_notifier_unregister depending on a race between +__mmu_notifier_release and amdgpu_mn_destroy. Use +mmu_notifier_unregister_no_release to avoid this. + +Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> +Reviewed-by: Christian König <christian.koenig@amd.com> +--- + drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c +index 61f0e3c..1b2105c 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c +@@ -86,7 +86,7 @@ static void amdgpu_mn_destroy(struct work_struct *work) + } + mutex_unlock(&adev->mn_lock); + up_write(&rmn->mm->mmap_sem); +- mmu_notifier_unregister(&rmn->mn, rmn->mm); ++ mmu_notifier_unregister_no_release(&rmn->mn, rmn->mm); + kfree(rmn); + } + +-- +2.7.4 + |