PCI: stm32: Fix EP page_size alignment

pci_epc_mem_alloc_addr() allocates a CPU address from the ATU window phys
base and a page number. Set the ep->page_size so the resulting CPU address
is correctly aligned with the ATU required alignment.

Fixes: 151f3d29baf4 ("PCI: stm32-ep: Add PCIe Endpoint support for STM32MP25")
Signed-off-by: Christian Bruel <christian.bruel@foss.st.com>
[mani: added fixes tag]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20251114-atu_align_ep-v1-1-88da5366fa04@foss.st.com

diff --git a/drivers/pci/controller/dwc/pcie-stm32-ep.c b/drivers/pci/controller/dwc/pcie-stm32-ep.c
index faa6433a784f37afc799bba58c345d6c66562492..7d48038d576d9043e320bc5061a1f54b175ea53d 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-stm32-ep.c
+++ b/drivers/pci/controller/dwc/pcie-stm32-ep.c
@@ -214,6 +214,8 @@ static int stm32_add_pcie_ep(struct stm32_pcie *stm32_pcie,
 
        ep->ops = &stm32_pcie_ep_ops;
 
+       ep->page_size = stm32_pcie_epc_features.align;
+
        ret = dw_pcie_ep_init(ep);
        if (ret) {
                dev_err(dev, "Failed to initialize ep: %d\n", ret);