From: Willy Tarreau <w@xxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit b6d07e0273d3296cfbdc88145b8a00ddbefb310a upstream.
mvebu_pcie_handle_membase_change() and
mvebu_pcie_handle_iobase_change() do not correctly compute the window
size. PCI uses an inclusive start/end address pair, which requires a
+1 when converting to size.
This only worked because a bug in the mbus driver allowed it to
silently accept and round up bogus sizes.
Fix this by adding one to the computed size.
Fixes: 45361a4fe446 ('PCIe driver for Marvell Armada 370/XP systems')
Signed-off-by: Willy Tarreau <w@xxxxxx>
Reviewed-By: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/1397823593-1932-5-git-send-email-thomas.petazzoni@xxxxxxxxxxxxxxxxxx
Tested-by: Neil Greatorex <neil@xxxxxxxxxxxxxxx>
Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/pci/host/pci-mvebu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index b4214cba58b7..fdd81f24a9cf 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -297,7 +297,7 @@ static void mvebu_pcie_handle_iobase_change(struct mvebu_pcie_port *port)
port->iowin_base = port->pcie->io.start + iobase;
port->iowin_size = ((0xFFF | ((port->bridge.iolimit & 0xF0) << 8) |
(port->bridge.iolimitupper << 16)) -
- iobase);
+ iobase) + 1;
mvebu_mbus_add_window_remap_by_id(port->io_target, port->io_attr,
port->iowin_base, port->iowin_size,
@@ -331,7 +331,7 @@ static void mvebu_pcie_handle_membase_change(struct mvebu_pcie_port *port)
port->memwin_base = ((port->bridge.membase & 0xFFF0) << 16);
port->memwin_size =
(((port->bridge.memlimit & 0xFFF0) << 16) | 0xFFFFF) -
- port->memwin_base;
+ port->memwin_base + 1;
mvebu_mbus_add_window_by_id(port->mem_target, port->mem_attr,
port->memwin_base, port->memwin_size);
--
1.9.3
--
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