6.6-stable review patch. If anyone has any objections, please let me know.
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From: Richard Zhu hongxing.zhu@nxp.com
[ 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/<EPC>/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 hongxing.zhu@nxp.com [mani: reworded commit subject and description] Signed-off-by: Manivannan Sadhasivam mani@kernel.org [bhelgaas: commit log] Signed-off-by: Bjorn Helgaas bhelgaas@google.com Reviewed-by: Frank Li Frank.Li@nxp.com 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 sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/controller/dwc/pci-imx6.c | 2 -- 1 file changed, 2 deletions(-)
--- 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_ dev_err(dev, "failed to initialize endpoint\n"); return ret; } - /* Start LTSSM. */ - imx6_pcie_ltssm_enable(dev);
return 0; }