From 27b5107850688d27a5621ad954de14eee7279c76 Mon Sep 17 00:00:00 2001 From: Daniil Tatianin Date: Mon, 26 Dec 2022 14:48:23 +0300 Subject: net/ethtool/ioctl: return -EOPNOTSUPP if we have no phy stats [ Upstream commit 9deb1e9fb88b1120a908676fa33bdf9e2eeaefce ] It's not very useful to copy back an empty ethtool_stats struct and return 0 if we didn't actually have any stats. This also allows for further simplification of this function in the future commits. Signed-off-by: Daniil Tatianin Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/ethtool/ioctl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/ethtool/ioctl.c') diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index 81fe2422fe58..038398d41a93 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -2094,7 +2094,8 @@ static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr) return n_stats; if (n_stats > S32_MAX / sizeof(u64)) return -ENOMEM; - WARN_ON_ONCE(!n_stats); + if (WARN_ON_ONCE(!n_stats)) + return -EOPNOTSUPP; if (copy_from_user(&stats, useraddr, sizeof(stats))) return -EFAULT; -- cgit v1.2.3