PCI: mvebu: Fix I/O space end address calculation

[ Upstream commit dfd0309fd7b30a5baffaf47b2fccb88b46d64d69 ]

pcie->realio.end should be the address of last byte of the area,
therefore using resource_size() of another resource is not correct, we
must substract 1 to get the address of the last byte.

Fixes: 11be65472a427 ("PCI: mvebu: Adapt to the new device tree layout")
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index 8d88f19dc171145a74e8a87345796406f1c0ec37..12c1c1851ee6308b043a1a4db37a18ec3304ec2d 100644 (file)
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -1220,7 +1220,7 @@ static int mvebu_pcie_probe(struct platform_device *pdev)
                pcie->realio.start = PCIBIOS_MIN_IO;
                pcie->realio.end = min_t(resource_size_t,
                                         IO_SPACE_LIMIT,
-                                        resource_size(&pcie->io));
+                                        resource_size(&pcie->io) - 1);
        } else
                pcie->realio = pcie->io;