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| author | Daniil Tatianin <d-tatianin@yandex-team.ru> | 2022-12-26 14:48:23 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-12-28 11:55:24 +0000 |
| commit | 9deb1e9fb88b1120a908676fa33bdf9e2eeaefce (patch) | |
| tree | 7a0c536e3fc4da92da35d515b1fa071460f63758 /net/ethtool | |
| parent | 8ac718cc0e36ef4046e2d6349727fecddc13ab9c (diff) | |
| download | linux-stable-9deb1e9fb88b1120a908676fa33bdf9e2eeaefce.tar.gz linux-stable-9deb1e9fb88b1120a908676fa33bdf9e2eeaefce.tar.bz2 linux-stable-9deb1e9fb88b1120a908676fa33bdf9e2eeaefce.zip | |
net/ethtool/ioctl: return -EOPNOTSUPP if we have no phy stats
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 <d-tatianin@yandex-team.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ethtool')
| -rw-r--r-- | net/ethtool/ioctl.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index c2f1a542e6fa..932fa8225b2f 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -2099,7 +2099,8 @@ 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; |