drm/radeon/kms: Avoid crash when trying to cleanup uninitialized structure

Add boolean to record if some part of the driver are initialized or
not this allow to avoid a crash when trying to cleanup uninitialized
structure members.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

3 files changed, 13 insertions, 4 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index cd650fd3964e..53b55608102b 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -162,6 +162,7 @@ struct radeon_fence_driver {
         struct list_head                created;
         struct list_head                emited;
         struct list_head                signaled;
+        bool                            initialized;
 };
 
 struct radeon_fence {
@@ -202,8 +203,9 @@ struct radeon_surface_reg {
 struct radeon_mman {
         struct ttm_bo_global_ref        bo_global_ref;
         struct ttm_global_reference     mem_global_ref;
-        bool                            mem_global_referenced;
         struct ttm_bo_device            bdev;
+        bool                            mem_global_referenced;
+        bool                            initialized;
 };
 
 struct radeon_bo {
diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index cb4cd97ae39f..4cdd8b4f7549 100644
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -324,7 +324,7 @@ int radeon_fence_driver_init(struct radeon_device *rdev)
         write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
         r = radeon_scratch_get(rdev, &rdev->fence_drv.scratch_reg);
         if (r) {
-                DRM_ERROR("Fence failed to get a scratch register.");
+                dev_err(rdev->dev, "fence failed to get scratch register\n");
                 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
                 return r;
         }
@@ -335,9 +335,10 @@ int radeon_fence_driver_init(struct radeon_device *rdev)
         INIT_LIST_HEAD(&rdev->fence_drv.signaled);
         rdev->fence_drv.count_timeout = 0;
         init_waitqueue_head(&rdev->fence_drv.queue);
+        rdev->fence_drv.initialized = true;
         write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
         if (radeon_debugfs_fence_init(rdev)) {
-                DRM_ERROR("Failed to register debugfs file for fence !\n");
+                dev_err(rdev->dev, "fence debugfs file creation failed\n");
         }
         return 0;
 }
@@ -346,11 +347,13 @@ void radeon_fence_driver_fini(struct radeon_device *rdev)
 {
         unsigned long irq_flags;
 
+        if (!rdev->fence_drv.initialized)
+                return;
         wake_up_all(&rdev->fence_drv.queue);
         write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
         radeon_scratch_free(rdev, rdev->fence_drv.scratch_reg);
         write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
-        DRM_INFO("radeon: fence finalized\n");
+        rdev->fence_drv.initialized = false;
 }
 
 
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 7bed4122528c..a00450743d60 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -494,6 +494,7 @@ int radeon_ttm_init(struct radeon_device *rdev)
                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
                 return r;
         }
+        rdev->mman.initialized = true;
         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM,
                                 rdev->mc.real_vram_size >> PAGE_SHIFT);
         if (r) {
@@ -541,6 +542,8 @@ void radeon_ttm_fini(struct radeon_device *rdev)
 {
         int r;
 
+        if (!rdev->mman.initialized)
+                return;
         if (rdev->stollen_vga_memory) {
                 r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
                 if (r == 0) {
@@ -554,6 +557,7 @@ void radeon_ttm_fini(struct radeon_device *rdev)
         ttm_bo_device_release(&rdev->mman.bdev);
         radeon_gart_fini(rdev);
         radeon_ttm_global_fini(rdev);
+        rdev->mman.initialized = false;
         DRM_INFO("radeon: ttm finalized\n");
 }