Commit 6e5ebc96 authored by Tim Harvey's avatar Tim Harvey Committed by Lorenzo Pieralisi
Browse files

PCI: dwc: Do not remap invalid res 

On imx6 and perhaps others when pcie probes you get a:
imx6q-pcie 33800000.pcie: invalid resource

This occurs because the atu is not specified in the DT and as such it
should not be remapped.

Link: https://lore.kernel.org/r/20211101180243.23761-1-tharvey@gateworks.com


Fixes: 281f1f99 ("PCI: dwc: Detect number of iATU windows")
Signed-off-by: default avatarTim Harvey <tharvey@gateworks.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarRichard Zhu <hongxing.zhu@nxp.com>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
parent fa55b7dc

drivers/pci/controller/dwc/pcie-designware.c

+4 −3
Original line number Diff line number Diff line
@@ -672,10 +672,11 @@ void dw_pcie_iatu_detect(struct dw_pcie *pci) 
		if (!pci->atu_base) {

			struct resource *res =

				platform_get_resource_byname(pdev, IORESOURCE_MEM, "atu");

			if (res)

			if (res) {

				pci->atu_size = resource_size(res);

				pci->atu_base = devm_ioremap_resource(dev, res);

			if (IS_ERR(pci->atu_base))

			}

			if (!pci->atu_base || IS_ERR(pci->atu_base))

				pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET;

		}