Commit 9000edb7 authored by Jakub Kicinski's avatar Jakub Kicinski Committed by David S. Miller
Browse files

net: ethtool: require drivers to set supported_coalesce_params 



Now that all in-tree drivers have been updated we can
make the supported_coalesce_params mandatory.

To save debugging time in case some driver was missed
(or is out of tree) add a warning when netdev is registered
with set_coalesce but without supported_coalesce_params.

Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
Reviewed-by: default avatarMichal Kubecek <mkubecek@suse.cz>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 329bab6e

include/linux/ethtool.h

+2 −0
Original line number Diff line number Diff line
@@ -458,6 +458,8 @@ struct ethtool_ops { 
					 struct ethtool_stats *, u64 *);

};



int ethtool_check_ops(const struct ethtool_ops *ops);



struct ethtool_rx_flow_rule {

	struct flow_rule	*rule;

	unsigned long		priv[0];

net/core/dev.c

+4 −0
Original line number Diff line number Diff line
@@ -9283,6 +9283,10 @@ int register_netdevice(struct net_device *dev) 
	BUG_ON(dev->reg_state != NETREG_UNINITIALIZED);

	BUG_ON(!net);



	ret = ethtool_check_ops(dev->ethtool_ops);

	if (ret)

		return ret;



	spin_lock_init(&dev->addr_list_lock);

	lockdep_set_class(&dev->addr_list_lock, &dev->addr_list_lock_key);

net/ethtool/common.c

+11 −0
Original line number Diff line number Diff line
@@ -289,3 +289,14 @@ out: 
	kfree(indir);

	return ret;

}



int ethtool_check_ops(const struct ethtool_ops *ops)

{

	if (WARN_ON(ops->set_coalesce && !ops->supported_coalesce_params))

		return -EINVAL;

	/* NOTE: sufficiently insane drivers may swap ethtool_ops at runtime,

	 * the fact that ops are checked at registration time does not

	 * mean the ops attached to a netdev later on are sane.

	 */

	return 0;

}

net/ethtool/ioctl.c

+0 −3
Original line number Diff line number Diff line
@@ -1519,9 +1519,6 @@ ethtool_set_coalesce_supported(struct net_device *dev, 
	u32 supported_params = dev->ethtool_ops->supported_coalesce_params;

	u32 nonzero_params = 0;



	if (!supported_params)

		return true;



	if (coalesce->rx_coalesce_usecs)

		nonzero_params |= ETHTOOL_COALESCE_RX_USECS;

	if (coalesce->rx_max_coalesced_frames)

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