PCI: designware: Fix IO resource end address calculation

End address should be equal to start_addr + size - 1.  Fix PCI IO resource
end address calculation.

Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Mohit KUMAR <mohit.kumar@st.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index b0dd2606edee..4d7cbd2975a5 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -454,7 +454,7 @@ int __init dw_pcie_host_init(struct pcie_port *pp)
                         pp->io.end = min_t(resource_size_t,
                                            IO_SPACE_LIMIT,
                                            range.pci_addr + range.size
-                                           + global_io_offset);
+                                           + global_io_offset - 1);
                         pp->io_size = resource_size(&pp->io);
                         pp->io_bus_addr = range.pci_addr;
                         pp->io_base = range.cpu_addr;