6.11-stable review patch. If anyone has any objections, please let me know.
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From: Richard Zhu hongxing.zhu@nxp.com
commit 5cb3aa92c7cf182940ae575c3f450d3708af087c upstream.
Correct occasional MSI triggering failures in i.MX8MP PCIe EP by applying the correct hardware outbound alignment requirement.
The i.MX platform has a restriction about outbound address translation. The pci-epc-mem uses page_size to manage it. Set the correct page_size for i.MX platform to meet the hardware requirement, which is the same as inbound address alignment.
Thus, align it with epc_features::align.
Fixes: 1bd0d43dcf3b ("PCI: imx6: Clean up addr_space retrieval code") Link: https://lore.kernel.org/linux-pci/20240729-pci2_upstream-v8-2-b68ee5ef2b4d@n... Signed-off-by: Richard Zhu hongxing.zhu@nxp.com Signed-off-by: Frank Li Frank.Li@nxp.com [kwilczynski: commit log] Signed-off-by: Krzysztof Wilczyński kwilczynski@kernel.org Reviewed-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Acked-by: Jason Liu jason.hui.liu@nxp.com Cc: stable@vger.kernel.org # 6.9+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/controller/dwc/pci-imx6.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1114,6 +1114,8 @@ static int imx6_add_pcie_ep(struct imx6_ if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_SUPPORT_64BIT)) dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
+ ep->page_size = imx6_pcie->drvdata->epc_features->align; + ret = dw_pcie_ep_init(ep); if (ret) { dev_err(dev, "failed to initialize endpoint\n");