Commit 9deb1e9f authored by Daniil Tatianin's avatar Daniil Tatianin Committed by David S. Miller

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: default avatarDaniil Tatianin <d-tatianin@yandex-team.ru>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8ac718cc
......@@ -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;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment