4.4-stable review patch. If anyone has any objections, please let me know.
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From: Rex Zhu Rex.Zhu@amd.com
commit 1bced75f4ab04bec55aecb57d99435dc6d0ae5a0 upstream.
it is required if a platform supports PCIe root complex core voltage reduction. After receiving this notification, SBIOS can apply default PCIe root complex power policy.
Reviewed-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Rex Zhu Rex.Zhu@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c @@ -585,6 +585,9 @@ int amdgpu_acpi_pcie_performance_request size_t size; u32 retry = 3;
+ if (amdgpu_acpi_pcie_notify_device_ready(adev)) + return -EINVAL; + /* Get the device handle */ handle = ACPI_HANDLE(&adev->pdev->dev); if (!handle)