When a bus specifies #address-cells > 2, of_bus_default_map() now assumes that the mapping isn't for a physical address but rather an identifier that needs to match exactly. This is required by bindings that use multiple cells to translate a resource to the parent bus (device index, type, ...). See here for the discussion: https://lists.ozlabs.org/pipermail/devicetree-discuss/2012-June/016577.html Originally-by: Arnd Bergmann <arnd@xxxxxxxx> Signed-off-by: Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx> --- Changes in v3: - new patch drivers/of/address.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/of/address.c b/drivers/of/address.c index 7e262a6..2776119 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -69,6 +69,14 @@ static u64 of_bus_default_map(u32 *addr, const __be32 *range, (unsigned long long)cp, (unsigned long long)s, (unsigned long long)da); + /* + * If the number of address cells is larger than 2 we assume the + * mapping doesn't specify a physical address. Rather, the address + * specifies an identifier that must match exactly. + */ + if (na > 2 && memcmp(range, addr, na * 4) != 0) + return OF_BAD_ADDR; + if (da < cp || da >= (cp + s)) return OF_BAD_ADDR; return da - cp; -- 1.7.11.2 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
