Re: [PATCH net-next v4 3/4] net: macb: Add ARP support to WOL

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Hi Andrew,



On 10/06/24 6:16 pm, Andrew Lunn wrote:
@@ -3294,22 +3292,15 @@ static int macb_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
/* Pass the order to phylink layer */
  	ret = phylink_ethtool_set_wol(bp->phylink, wol);
-	/* Don't manage WoL on MAC if handled by the PHY
-	 * or if there's a failure in talking to the PHY
-	 */
-	if (!ret || ret != -EOPNOTSUPP)
+	/* Don't manage WoL on MAC if there's a failure in talking to the PHY */
+	if (!!ret && ret != -EOPNOTSUPP)
  		return ret;

The comment is wrong. You could be happily talking to the PHY, it just
does not support what you asked it to do.



These are the 3 possible return scenarios

1. -EOPNOTSUPP. : When there is no PHY or no set_wol() in PHY driver.
2. 0 : Success
3. any error (-EINVAL, ... ) from set_wol()

we are returning in case 3.

The comment can be "Don't manage WoL on MAC, if PHY set_wol() fails"

please let me know your thoughts/comments.


🙏 vineeth






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