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net: remove .ndo_change_proto_down

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.ndo_change_proto_down was added seemingly to enable out-of-tree
implementations. Over 2.5yrs later we still have no real users
upstream. Hardwire the generic implementation for now, we can
revert once real users materialize. (rocker is a test vehicle,
not a user.)

We need to drop the optimization on the sysfs side, because
unlike ndos priv_flags will be changed at runtime, so we'd
need READ_ONCE/WRITE_ONCE everywhere..

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
2021-11-22 17:24:47 -08:00
committed by David S. Miller
parent c384cee14a
commit 2106efda78
8 changed files with 11 additions and 58 deletions
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3
net/core/rtnetlink.c
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@@ -2539,13 +2539,12 @@ static int do_set_proto_down(struct net_device *dev,
struct netlink_ext_ack *extack)
{
struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
const struct net_device_ops *ops = dev->netdev_ops;
unsigned long mask = 0;
u32 value;
bool proto_down;
int err;
if (!ops->ndo_change_proto_down) {
if (!(dev->priv_flags & IFF_CHANGE_PROTO_DOWN)) {
NL_SET_ERR_MSG(extack, "Protodown not supported by device");
return -EOPNOTSUPP;
}