Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.16 0785/1039] PCI: dwc: Do not remap invalid res | Date | Mon, 24 Jan 2022 19:42:54 +0100 |
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From: Tim Harvey <tharvey@gateworks.com>
[ Upstream commit 6e5ebc96ec651b67131f816d7e3bf286c635e749 ]
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: 281f1f99cf3a ("PCI: dwc: Detect number of iATU windows") Signed-off-by: Tim Harvey <tharvey@gateworks.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Richard Zhu <hongxing.zhu@nxp.com> Cc: Richard Zhu <hongxing.zhu@nxp.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/pci/controller/dwc/pcie-designware.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 850b4533f4ef5..d92c8a25094fa 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -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)) + pci->atu_base = devm_ioremap_resource(dev, res); + } + if (!pci->atu_base || IS_ERR(pci->atu_base)) pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET; } -- 2.34.1
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