Insure property is in valid range and fail when reading DT if it is not.
Also add error message for existing failure if required property is not
present.
Cc: Andrew Lunn <andrew@xxxxxxx>
Cc: Florian Fainelli <f.fainelli@xxxxxxxxx>
Cc: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Signed-off-by: Trent Piepho <tpiepho@xxxxxxxxxx>
---
Notes:
Changes from v1:
New patch in series v2
drivers/net/phy/dp83867.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c
index 5ece153aa9c3..ce46ff4cf880 100644
--- a/drivers/net/phy/dp83867.c
+++ b/drivers/net/phy/dp83867.c
@@ -65,7 +65,8 @@
/* PHY CTRL bits */
#define DP83867_PHYCR_FIFO_DEPTH_SHIFT 14
-#define DP83867_PHYCR_FIFO_DEPTH_MASK (3 << 14)
+#define DP83867_PHYCR_FIFO_DEPTH_MAX 0x03
+#define DP83867_PHYCR_FIFO_DEPTH_MASK GENMASK(15, 14)
#define DP83867_PHYCR_RESERVED_MASK BIT(11)
/* RGMIIDCTL bits */
@@ -245,8 +246,20 @@ static int dp83867_of_init(struct phy_device *phydev)
if (of_property_read_bool(of_node, "enet-phy-lane-no-swap"))
dp83867->port_mirroring = DP83867_PORT_MIRROING_DIS;
- return of_property_read_u32(of_node, "ti,fifo-depth",
+ ret = of_property_read_u32(of_node, "ti,fifo-depth",
&dp83867->fifo_depth);
+ if (ret) {
+ phydev_err(phydev,
+ "ti,fifo-depth property is required\n");
+ return ret;
+ }
+ if (dp83867->fifo_depth > DP83867_PHYCR_FIFO_DEPTH_MAX) {
+ phydev_err(phydev,
+ "ti,fifo-depth value %u out of range\n",
+ dp83867->fifo_depth);
+ return -EINVAL;
+ }
+ return 0;
}
#else
static int dp83867_of_init(struct phy_device *phydev)
--
2.14.5
