6.11-stable review patch. If anyone has any objections, please let me know.
------------------
From: Richard Zhu <hongxing.zhu@xxxxxxx>
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@xxxxxxx
Signed-off-by: Richard Zhu <hongxing.zhu@xxxxxxx>
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@xxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Acked-by: Jason Liu <jason.hui.liu@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 6.9+
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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");
