[PATCH] drm/amdgpu: fix pci device refcount leak

[Yang Yingliang]

As comment of pci_get_domain_bus_and_slot() says, it returns
a pci device with refcount increment, when finish using it,
the caller must decrement the reference count by calling
pci_dev_put().

So before returning from amdgpu_device_resume|suspend_display_audio(),
pci_dev_put() is called to avoid refcount leak.

Fixes: 3f12acc8d6d4 ("drm/amdgpu: put the audio codec into suspend state before 
gpu reset V3")
Signed-off-by: Yang Yingliang <yangyingli...@huawei.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 64510898eedd..69e73fef1ab2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -5027,6 +5027,8 @@ static void amdgpu_device_resume_display_audio(struct 
amdgpu_device *adev)
                pm_runtime_enable(&(p->dev));
                pm_runtime_resume(&(p->dev));
        }
+
+       pci_dev_put(p);
 }
 
 static int amdgpu_device_suspend_display_audio(struct amdgpu_device *adev)
@@ -5065,6 +5067,7 @@ static int amdgpu_device_suspend_display_audio(struct 
amdgpu_device *adev)
 
                if (expires < ktime_get_mono_fast_ns()) {
                        dev_warn(adev->dev, "failed to suspend display 
audio\n");
+                       pci_dev_put(p);
                        /* TODO: abort the succeeding gpu reset? */
                        return -ETIMEDOUT;
                }
@@ -5072,6 +5075,7 @@ static int amdgpu_device_suspend_display_audio(struct 
amdgpu_device *adev)
 
        pm_runtime_disable(&(p->dev));
 
+       pci_dev_put(p);
        return 0;
 }
 
-- 
2.25.1