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From 3d5a08c114585e5b9f890807b04d2730dafde5e1 Mon Sep 17 00:00:00 2001
From: "monk.liu" <monk.liu@amd.com>
Date: Tue, 26 May 2015 10:22:41 +0800
Subject: [PATCH 0228/1050] drm/amdgpu: max_pde_used usage should be under
protect
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Need to take the lock when accessing this.
Signed-off-by: monk.liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <jammy.zhou@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index cc6dca2..dcb2d38 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -90,10 +90,13 @@ struct amdgpu_bo_list_entry *amdgpu_vm_get_bos(struct amdgpu_device *adev,
struct amdgpu_bo_list_entry *list;
unsigned i, idx;
+ mutex_lock(&vm->mutex);
list = drm_malloc_ab(vm->max_pde_used + 2,
sizeof(struct amdgpu_bo_list_entry));
- if (!list)
+ if (!list) {
+ mutex_unlock(&vm->mutex);
return NULL;
+ }
/* add the vm page table to the list */
list[0].robj = vm->page_directory;
@@ -116,6 +119,7 @@ struct amdgpu_bo_list_entry *amdgpu_vm_get_bos(struct amdgpu_device *adev,
list[idx].tv.shared = true;
list_add(&list[idx++].tv.head, head);
}
+ mutex_unlock(&vm->mutex);
return list;
}
--
1.9.1
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