Patch "drm/amdgpu: fix pci device refcount leak" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    drm/amdgpu: fix pci device refcount leak

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amdgpu-fix-pci-device-refcount-leak.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit c9d457b554b5c93d1b811ccc63a928aea163fc83
Author: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Date:   Thu Nov 17 23:00:03 2022 +0800

    drm/amdgpu: fix pci device refcount leak
    
    [ Upstream commit b85e285e3d6352b02947fc1b72303673dfacb0aa ]
    
    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")
    Reviewed-by: Evan Quan <evan.quan@xxxxxxx>
    Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 36cc89f56cea..0d998bc830c2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4902,6 +4902,8 @@ 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)
@@ -4940,6 +4942,7 @@ 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;
 		}
@@ -4947,6 +4950,7 @@ static int amdgpu_device_suspend_display_audio(struct amdgpu_device *adev)
 
 	pm_runtime_disable(&(p->dev));
 
+	pci_dev_put(p);
 	return 0;
 }