PCI: mvebu: Fix potential issue in range parsing

commit 4f4bde1df33bde076f53325bdf2c6430cf85e1bb upstream.

The second parameter of of_read_number() is not the index, but a size.  As
it happens, in this case it may work just fine because of the conversion to
u32 and the favorable endianness on this architecture.

Fixes: 11be65472a427 ("PCI: mvebu: Adapt to the new device tree layout")
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
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 0e79665afd445ebb8e6198a274960978c58c619e..05e3528898682930146aa15212cd8dc28b82d90e 100644 (file)
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -797,7 +797,7 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
 
        for (i = 0; i < nranges; i++) {
                u32 flags = of_read_number(range, 1);
-               u32 slot = of_read_number(range, 2);
+               u32 slot = of_read_number(range + 1, 1);
                u64 cpuaddr = of_read_number(range + na, pna);
                unsigned long rtype;