In of_mdiobus_register(), the __be32 *addr variable is dereferenced.
This will not work on little-endian targets. Also since it is
unsigned, checking for less than zero is redundant.
Fix these two issues.
Signed-off-by: David Daney <ddaney@xxxxxxxxxxxxxxxxxx>
Cc: Grant Likely <grant.likely@xxxxxxxxxxxx>
Cc: Jeremy Kerr <jeremy.kerr@xxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Dan Carpenter <error27@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/of/of_mdio.c | 23 ++++++++++++++---------
1 files changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 1fce00e..b370306 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -52,27 +52,32 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
/* Loop over the child nodes and register a phy_device for each one */
for_each_child_of_node(np, child) {
- const __be32 *addr;
+ const __be32 *paddr;
+ u32 addr;
int len;
/* A PHY must have a reg property in the range [0-31] */
- addr = of_get_property(child, "reg", &len);
- if (!addr || len < sizeof(*addr) || *addr >= 32 || *addr < 0) {
+ paddr = of_get_property(child, "reg", &len);
+ if (!paddr || len < sizeof(*paddr)) {
+addr_err:
dev_err(&mdio->dev, "%s has invalid PHY address\n",
child->full_name);
continue;
}
+ addr = be32_to_cpup(paddr);
+ if (addr >= 32)
+ goto addr_err;
if (mdio->irq) {
- mdio->irq[*addr] = irq_of_parse_and_map(child, 0);
- if (!mdio->irq[*addr])
- mdio->irq[*addr] = PHY_POLL;
+ mdio->irq[addr] = irq_of_parse_and_map(child, 0);
+ if (!mdio->irq[addr])
+ mdio->irq[addr] = PHY_POLL;
}
- phy = get_phy_device(mdio, be32_to_cpup(addr));
+ phy = get_phy_device(mdio, addr);
if (!phy || IS_ERR(phy)) {
dev_err(&mdio->dev, "error probing PHY at address %i\n",
- *addr);
+ addr);
continue;
}
phy_scan_fixups(phy);
@@ -91,7 +96,7 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
}
dev_dbg(&mdio->dev, "registered phy %s at address %i\n",
- child->name, *addr);
+ child->name, addr);
}
return 0;
--
1.7.2.3
