linux-kernel - [PATCH net v2 2/3] net/ethtool/ioctl: remove if n_stats checks from ethtool_get_phy

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Message-Id: <20221226114825.1937189-3-d-tatianin@yandex-team.ru>
Date:   Mon, 26 Dec 2022 14:48:24 +0300
From:   Daniil Tatianin <d-tatianin@...dex-team.ru>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     Daniil Tatianin <d-tatianin@...dex-team.ru>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
        Sean Anderson <sean.anderson@...o.com>,
        Jiri Pirko <jiri@...dia.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Maxim Korotkov <korotkov.maxim.s@...il.com>,
        Gal Pressman <gal@...dia.com>,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>,
        Tom Rix <trix@...hat.com>, Marco Bonelli <marco@...eim.net>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net v2 2/3] net/ethtool/ioctl: remove if n_stats checks from ethtool_get_phy_stats

Now that we always early return if we don't have any stats we can remove
these checks as they're no longer necessary.

Signed-off-by: Daniil Tatianin <d-tatianin@...dex-team.ru>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
 net/ethtool/ioctl.c | 24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index e8a294b38b7b..3379af21c29f 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -2101,28 +2101,24 @@ static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
 
 	stats.n_stats = n_stats;
 
-	if (n_stats) {
-		data = vzalloc(array_size(n_stats, sizeof(u64)));
-		if (!data)
-			return -ENOMEM;
+	data = vzalloc(array_size(n_stats, sizeof(u64)));
+	if (!data)
+		return -ENOMEM;
 
-		if (phydev && !ops->get_ethtool_phy_stats &&
-		    phy_ops && phy_ops->get_stats) {
-			ret = phy_ops->get_stats(phydev, &stats, data);
-			if (ret < 0)
-				goto out;
-		} else {
-			ops->get_ethtool_phy_stats(dev, &stats, data);
-		}
+	if (phydev && !ops->get_ethtool_phy_stats &&
+		phy_ops && phy_ops->get_stats) {
+		ret = phy_ops->get_stats(phydev, &stats, data);
+		if (ret < 0)
+			goto out;
 	} else {
-		data = NULL;
+		ops->get_ethtool_phy_stats(dev, &stats, data);
 	}
 
 	ret = -EFAULT;
 	if (copy_to_user(useraddr, &stats, sizeof(stats)))
 		goto out;
 	useraddr += sizeof(stats);
-	if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
+	if (copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
 		goto out;
 	ret = 0;
 
-- 
2.25.1