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-rw-r--r--meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0789-drm-amdgpu-get-core-kref-in-sem_import-V2.patch47
1 files changed, 47 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0789-drm-amdgpu-get-core-kref-in-sem_import-V2.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0789-drm-amdgpu-get-core-kref-in-sem_import-V2.patch
new file mode 100644
index 00000000..79262db9
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0789-drm-amdgpu-get-core-kref-in-sem_import-V2.patch
@@ -0,0 +1,47 @@
+From 57f06ca4585907aa42a2dcc656d762218940ff85 Mon Sep 17 00:00:00 2001
+From: Chunming Zhou <David1.Zhou@amd.com>
+Date: Fri, 10 Feb 2017 17:07:05 +0800
+Subject: [PATCH 0789/4131] drm/amdgpu: get core->kref in sem_import V2
+
+V2: remove mutex protection for core->kref
+
+Change-Id: I39c83946e7bf078b4a527ba26747cc4f400592e0
+Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
+Reviewed-by: David Mao <David.Mao@amd.com>
+---
+ drivers/gpu/drm/amd/amdgpu/amdgpu_sem.c | 8 +++++---
+ 1 file changed, 5 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sem.c
+index 3c4ee76..a30b5cb 100644
+--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sem.c
++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sem.c
+@@ -225,10 +225,11 @@ static int amdgpu_sem_import(struct amdgpu_fpriv *fpriv,
+ return -EINVAL;
+ }
+
++ kref_get(&core->kref);
+ sem = amdgpu_sem_alloc();
+ if (!sem) {
+ ret = -ENOMEM;
+- goto err_out;
++ goto err_sem;
+ }
+
+ sem->base = core;
+@@ -246,9 +247,10 @@ static int amdgpu_sem_import(struct amdgpu_fpriv *fpriv,
+
+ *handle = ret;
+ return 0;
+-
++err_sem:
++ kref_put(&core->kref, amdgpu_sem_core_free);
+ err_out:
+- kfree(sem);
++ amdgpu_sem_put(sem);
+ return ret;
+
+ }
+--
+2.7.4
+