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| author | Richard Zhu <hongxing.zhu@nxp.com> | 2025-07-09 06:37:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-28 17:30:59 +0300 |
| commit | 7c001febe46a5df88aa893cf02d41a1048ad07f0 (patch) | |
| tree | 7a43a763ac220c41eb5809fc6d888fefa65bbe92 | |
| parent | 90fa5884bc8f52cbf493492e32978c723c85e6ab (diff) | |
| download | linux-7c001febe46a5df88aa893cf02d41a1048ad07f0.tar.xz | |
PCI: imx6: Delay link start until configfs 'start' written
commit 2e6ea70690ddd1ffa422423fd0d4523e4dfe4b62 upstream.
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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/pci/controller/dwc/pci-imx6.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 0da9542940c7..9a05ad8639b3 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1191,9 +1191,6 @@ static int imx_add_pcie_ep(struct imx_pcie *imx_pcie, pci_epc_init_notify(ep->epc); - /* Start LTSSM. */ - imx_pcie_ltssm_enable(dev); - return 0; } |