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Diffstat (limited to 'meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/1184-drm-amdkfd-Avoid-calling-amd_iommu_unbind_pasid-when.patch')
-rw-r--r--meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/1184-drm-amdkfd-Avoid-calling-amd_iommu_unbind_pasid-when.patch53
1 files changed, 53 insertions, 0 deletions
diff --git a/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/1184-drm-amdkfd-Avoid-calling-amd_iommu_unbind_pasid-when.patch b/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/1184-drm-amdkfd-Avoid-calling-amd_iommu_unbind_pasid-when.patch
new file mode 100644
index 00000000..ee5ac7b5
--- /dev/null
+++ b/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/1184-drm-amdkfd-Avoid-calling-amd_iommu_unbind_pasid-when.patch
@@ -0,0 +1,53 @@
+From 9a197ff07ae9805c29e796af88016eed218d8d54 Mon Sep 17 00:00:00 2001
+From: Yong Zhao <yong.zhao@amd.com>
+Date: Wed, 7 Sep 2016 19:26:37 -0400
+Subject: [PATCH 1184/4131] drm/amdkfd: Avoid calling amd_iommu_unbind_pasid()
+ when suspending
+
+When kfd suspending on APU, we do not need to call
+amd_iommu_unbind_pasid(), because pasid will be unbound automatically
+when power goes off.
+
+On the other hand, calling amd_iommu_unbind_pasid() will trigger
+kfd_process_iommu_unbind_callback() if the process is not terminating.
+By design, kfd_process_iommu_unbind_callback() should only be called
+for process terminating. So we would rather not to call
+amd_iommu_unbind_pasid() when suspending.
+
+Change-Id: I9fb0770509df64bcbf8b48dd869032c6cef4946b
+Signed-off-by: Yong Zhao <yong.zhao@amd.com>
+---
+ drivers/gpu/drm/amd/amdkfd/kfd_process.c | 8 ++------
+ 1 file changed, 2 insertions(+), 6 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+index ca4ed91..cd33ffc 100644
+--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
++++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+@@ -825,21 +825,17 @@ void kfd_unbind_processes_from_device(struct kfd_dev *dev)
+ {
+ struct kfd_process_device *pdd;
+ struct kfd_process *p;
+- unsigned int temp, temp_bound, temp_pasid;
++ unsigned int temp;
+
+ int idx = srcu_read_lock(&kfd_processes_srcu);
+
+ hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) {
+ down_write(&p->lock);
+ pdd = kfd_get_process_device_data(dev, p);
+- temp_bound = pdd->bound;
+- temp_pasid = p->pasid;
++
+ if (pdd->bound == PDD_BOUND)
+ pdd->bound = PDD_BOUND_SUSPENDED;
+ up_write(&p->lock);
+-
+- if (temp_bound == PDD_BOUND)
+- amd_iommu_unbind_pasid(dev->pdev, temp_pasid);
+ }
+
+ srcu_read_unlock(&kfd_processes_srcu, idx);
+--
+2.7.4
+