Make sure never to update more than two bits when setting the led mode,
something which could for example change the reference-clock setting.
Signed-off-by: Johan Hovold <jo...@kernel.org>
---
drivers/net/phy/micrel.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 16135ac18bfe..1b3985cdc64c 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -173,6 +173,11 @@ static int kszphy_setup_led(struct phy_device *phydev,
if (of_property_read_u32(of_node, "micrel,led-mode", &val))
return 0;
+ if (val > 3) {
+ dev_err(&phydev->dev, "invalid led mode: 0x%02x\n", val);
+ return -EINVAL;
+ }
+
temp = phy_read(phydev, reg);
if (temp < 0)
return temp;
--
2.0.4
--
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