Commit 6a139499 authored by Qiang Yu's avatar Qiang Yu Committed by Manivannan Sadhasivam
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PCI: qcom: Remove DPC Extended Capability 



Some platforms (e.g., X1E80100) expose Downstream Port Containment (DPC)
Extended Capability registers in the PCIe Root Port config space, but do
not fully support it. To prevent undefined behavior and ensure DPC cap is
not visible to PCI framework and users, remove DPC Extended Capability
unconditionally, since there is no Qcom platform support DPC till now.

Co-developed-by: default avatarWenbin Yao <wenbin.yao@oss.qualcomm.com>
Signed-off-by: default avatarWenbin Yao <wenbin.yao@oss.qualcomm.com>
Signed-off-by: default avatarQiang Yu <qiang.yu@oss.qualcomm.com>
Signed-off-by: default avatarManivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20251109-remove_cap-v1-5-2208f46f4dc2@oss.qualcomm.com
parent 7c29cd0f

drivers/pci/controller/dwc/pcie-qcom.c

+1 −0
Original line number Diff line number Diff line
@@ -1317,6 +1317,7 @@ static int qcom_pcie_host_init(struct dw_pcie_rp *pp) 
	}



	dw_pcie_remove_capability(pcie->pci, PCI_CAP_ID_MSIX);

	dw_pcie_remove_ext_capability(pcie->pci, PCI_EXT_CAP_ID_DPC);



	qcom_ep_reset_deassert(pcie);