net: fec: Do a sanity check on the gpio number
Check whether the phy-reset GPIO is valid, prior to requesting it.
In the case a board does not provide a phy-reset GPIO, just returns immediately.
With such gpio validation in place, it is also safe to change from pr_debug to
dev_err in the case the gpio request fails.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index 0fe68c4..29d82cf 100644
--- a/drivers/net/ethernet/freescale/fec.c
+++ b/drivers/net/ethernet/freescale/fec.c
@@ -1689,10 +1689,13 @@
msec = 1;
phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);
+ if (!gpio_is_valid(phy_reset))
+ return;
+
err = devm_gpio_request_one(&pdev->dev, phy_reset,
GPIOF_OUT_INIT_LOW, "phy-reset");
if (err) {
- pr_debug("FEC: failed to get gpio phy-reset: %d\n", err);
+ dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", err);
return;
}
msleep(msec);