[PATCH net-next v5 3/6] dsa: lan9303: Add exception logic for read failure

[Jerry Ray]

While it is highly unlikely a read will ever fail, This code fragment is
now in a function that allows us to return an error code. A read failure
here will cause the lan9303_probe to fail.

Signed-off-by: Jerry Ray <jerry.ray@xxxxxxxxxxxxx>
---
 drivers/net/dsa/lan9303-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index 20fc2af62531..b0f49d9c3d0c 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c
@@ -887,7 +887,9 @@ static int lan9303_check_device(struct lan9303 *chip)
 	}
 
 	/* Virtual Phy: Remove Turbo 200Mbit mode */
-	lan9303_read(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, &reg);
+	ret = lan9303_read(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, &reg);
+	if (ret)
+		return (ret);
 
 	reg &= ~LAN9303_VIRT_SPECIAL_TURBO;
 	regmap_write(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, reg);
-- 
2.17.1