From: Richard Zhu Date: Fri, 22 Aug 2025 20:40:52 +0000 (-0400) Subject: PCI: imx6: Delay link start until configfs 'start' written X-Git-Tag: v6.6.103~94 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d0252e69b9322d1f230858fa6da77f9965119d3f;p=thirdparty%2Fkernel%2Fstable.git PCI: imx6: Delay link start until configfs 'start' written [ Upstream commit 2e6ea70690ddd1ffa422423fd0d4523e4dfe4b62 ] According to Documentation/PCI/endpoint/pci-endpoint-cfs.rst, the Endpoint controller (EPC) should only start the link when userspace writes '1' to the '/sys/kernel/config/pci_ep/controllers//start' attribute, which ultimately results in calling imx_pcie_start_link() via pci_epc_start_store(). To align with the documented behavior, do not start the link automatically when adding the EP controller. Fixes: 75c2f26da03f ("PCI: imx6: Add i.MX PCIe EP mode support") Signed-off-by: Richard Zhu [mani: reworded commit subject and description] Signed-off-by: Manivannan Sadhasivam [bhelgaas: commit log] Signed-off-by: Bjorn Helgaas Reviewed-by: Frank Li Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20250709033722.2924372-3-hongxing.zhu@nxp.com [ imx_pcie_ltssm_enable() => imx6_pcie_ltssm_enable() ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index cedfbd4258631..2bcc86ee14f40 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1098,8 +1098,6 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pcie, dev_err(dev, "failed to initialize endpoint\n"); return ret; } - /* Start LTSSM. */ - imx6_pcie_ltssm_enable(dev); return 0; }