1 files changed, 64 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1217-drm-amdkfd-Always-release-process-in-a-work-queue.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1217-drm-amdkfd-Always-release-process-in-a-work-queue.patch
new file mode 100644
index 00000000..5e5bf6b0
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1217-drm-amdkfd-Always-release-process-in-a-work-queue.patch
@@ -0,0 +1,64 @@
+From 49c16d301a2567d7e231dfcb730534097faaea8c Mon Sep 17 00:00:00 2001
+From: Felix Kuehling <Felix.Kuehling@amd.com>
+Date: Tue, 24 Jan 2017 20:48:13 -0500
+Subject: [PATCH 1217/4131] drm/amdkfd: Always release process in a work queue
+
+Run process clean-up triggered by kfd_unref_process in a work queue
+to avoid recursive locking issues.
+
+Change-Id: I27ac43548a986bbe49d3ebe7f7d655a25b6349d5
+Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
+---
+ drivers/gpu/drm/amd/amdkfd/kfd_process.c | 20 ++++++++++----------
+ 1 file changed, 10 insertions(+), 10 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+index 63e85de..10bddc9 100644
+--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
++++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+@@ -327,9 +327,10 @@ static void kfd_process_destroy_pdds(struct kfd_process *p)
+  * is not findable any more. We must assume that no other thread is
+  * using it any more, otherwise we couldn't safely free the process
+  * stucture in the end. */
+-static void kfd_process_ref_release(struct kref *ref)
++static void kfd_process_wq_release(struct work_struct *work)
+ {
+-	struct kfd_process *p = container_of(ref, struct kfd_process, ref);
++	struct kfd_process *p = container_of(work, struct kfd_process,
++					     release_work);
+ 	struct kfd_process_device *pdd;
+ 
+ 	pr_debug("Releasing process (pasid %d)\n",
+@@ -361,22 +362,21 @@ static void kfd_process_ref_release(struct kref *ref)
+ 	kfree(p);
+ }
+ 
+-static void kfd_process_wq_release(struct work_struct *work)
++static void kfd_process_ref_release(struct kref *ref)
+ {
+-	struct kfd_process *p = container_of(work, struct kfd_process,
+-					     release_work);
++	struct kfd_process *p = container_of(ref, struct kfd_process, ref);
+ 
+-	kref_put(&p->ref, kfd_process_ref_release);
++	BUG_ON(!kfd_process_wq);
++
++	INIT_WORK(&p->release_work, kfd_process_wq_release);
++	queue_work(kfd_process_wq, &p->release_work);
+ }
+ 
+ static void kfd_process_destroy_delayed(struct rcu_head *rcu)
+ {
+ 	struct kfd_process *p = container_of(rcu, struct kfd_process, rcu);
+ 
+-	BUG_ON(!kfd_process_wq);
+-
+-	INIT_WORK(&p->release_work, kfd_process_wq_release);
+-	queue_work(kfd_process_wq, &p->release_work);
++	kfd_unref_process(p);
+ }
+ 
+ static void kfd_process_notifier_release(struct mmu_notifier *mn,
+-- 
+2.7.4
+