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authorDavid Daney <ddaney@caviumnetworks.com>2010-10-27 18:03:47 -0700
committerGrant Likely <grant.likely@secretlab.ca>2010-12-24 01:25:54 -0700
commit194588604765ac803f98fb9d19a36f6b835f4620 (patch)
tree940c6a26436c7dfa38152a8479d0641e9a19d7df /drivers/of
parent0131d8973c8b9bd9d40fee8fae24eab24821efdb (diff)
of/mdio: Fix some endianness problems.
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@caviumnetworks.com> [grant.likely@secretlab.ca: removed goto] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/of_mdio.c26
1 files changed, 17 insertions, 9 deletions
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 1fce00eb421b..dcd7857784f2 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -52,27 +52,35 @@ 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)) {
dev_err(&mdio->dev, "%s has invalid PHY address\n",
child->full_name);
continue;
}
+ addr = be32_to_cpup(paddr);
+ if (addr >= 32) {
+ dev_err(&mdio->dev, "%s PHY address %i is too large\n",
+ child->full_name, addr);
+ continue;
+ }
+
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 +99,7 @@ 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;

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