Commit 0df55a03 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'ethtool-netlink-bug-fixes' 



Maxim Mikityanskiy says:

====================
ethtool-netlink bug fixes

This series contains a few bug fixes for ethtool-netlink. These bugs are
specific for the netlink interface, and the legacy ioctl interface is
not affected. These patches aim to have the same behavior in
ethtool-netlink as in the legacy ethtool.

Please also see the sibling series for the userspace tool.

v2 changes: Added Fixes tags.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 4ef1a7cb f01204ec

net/ethtool/features.c

+10 −9
Original line number Diff line number Diff line
@@ -224,7 +224,9 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info) 
	DECLARE_BITMAP(wanted_diff_mask, NETDEV_FEATURE_COUNT);

	DECLARE_BITMAP(active_diff_mask, NETDEV_FEATURE_COUNT);

	DECLARE_BITMAP(old_active, NETDEV_FEATURE_COUNT);

	DECLARE_BITMAP(old_wanted, NETDEV_FEATURE_COUNT);

	DECLARE_BITMAP(new_active, NETDEV_FEATURE_COUNT);

	DECLARE_BITMAP(new_wanted, NETDEV_FEATURE_COUNT);

	DECLARE_BITMAP(req_wanted, NETDEV_FEATURE_COUNT);

	DECLARE_BITMAP(req_mask, NETDEV_FEATURE_COUNT);

	struct nlattr *tb[ETHTOOL_A_FEATURES_MAX + 1];
@@ -250,6 +252,7 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info) 


	rtnl_lock();

	ethnl_features_to_bitmap(old_active, dev->features);

	ethnl_features_to_bitmap(old_wanted, dev->wanted_features);

	ret = ethnl_parse_bitset(req_wanted, req_mask, NETDEV_FEATURE_COUNT,

				 tb[ETHTOOL_A_FEATURES_WANTED],

				 netdev_features_strings, info->extack);
@@ -261,17 +264,15 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info) 
		goto out_rtnl;

	}



	/* set req_wanted bits not in req_mask from old_active */

	/* set req_wanted bits not in req_mask from old_wanted */

	bitmap_and(req_wanted, req_wanted, req_mask, NETDEV_FEATURE_COUNT);

	bitmap_andnot(new_active, old_active, req_mask, NETDEV_FEATURE_COUNT);

	bitmap_or(req_wanted, new_active, req_wanted, NETDEV_FEATURE_COUNT);

	if (bitmap_equal(req_wanted, old_active, NETDEV_FEATURE_COUNT)) {

		ret = 0;

		goto out_rtnl;

	}



	dev->wanted_features = ethnl_bitmap_to_features(req_wanted);

	bitmap_andnot(new_wanted, old_wanted, req_mask, NETDEV_FEATURE_COUNT);

	bitmap_or(req_wanted, new_wanted, req_wanted, NETDEV_FEATURE_COUNT);

	if (!bitmap_equal(req_wanted, old_wanted, NETDEV_FEATURE_COUNT)) {

		dev->wanted_features &= ~dev->hw_features;

		dev->wanted_features |= ethnl_bitmap_to_features(req_wanted) & dev->hw_features;

		__netdev_update_features(dev);

	}

	ethnl_features_to_bitmap(new_active, dev->features);

	mod = !bitmap_equal(old_active, new_active, NETDEV_FEATURE_COUNT);

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