diff options
| author | Willy Tarreau <w@1wt.eu> | 2014-04-18 14:19:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-07 10:28:22 -0700 |
| commit | ebb332ca3d9b355cabc2c220c9b74114a26ece03 (patch) | |
| tree | 99c160494ca3164642e634513e724955c85957d4 /drivers/pci | |
| parent | fc94eff9a98437a6ca42b2cb27aa13bf4389c295 (diff) | |
PCI: mvebu: fix off-by-one in the computed size of the mbus windows
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@1wt.eu>
Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1397823593-1932-5-git-send-email-thomas.petazzoni@free-electrons.com
Tested-by: Neil Greatorex <neil@fatboyfat.co.uk>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pci-mvebu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c index 05e352889868..6a476b4bf2be 100644 --- a/drivers/pci/host/pci-mvebu.c +++ b/drivers/pci/host/pci-mvebu.c @@ -329,7 +329,7 @@ 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, @@ -362,7 +362,7 @@ 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); |