[PATCH net] net: spacemit: Hold RTNL lock in emac_resume() and emac_suspend()

[Breno Leitao]

On Fri, Nov 06, 2026 at 09:41:31AM +0000, Troy Mitchell wrote:
> On Thu, 5 Nov 2026 23:28:31 +0100, Vadim Fedorenko wrote:
> > > This would work, but I am wondering if it would be possible to call
> > > rtnl inside the _open function, when dealing with the PHY? in other
> > > words, shrink the time rtnl is held.
> >
> > +1, especially in emac_open() rtnl is needed only in error path case
> 
> emac_open() and emac_stop() are also the driver's .ndo_open and
> .ndo_stop, which the core already calls with RTNL held, see
> Documentation/networking/netdevices.rst +214. Taking rtnl_lock()
> inside them would deadlock on every open and close, so the lock has to
> stay in the PM callbacks.

That makes sense to me.

Reviewed-by: Breno Leitao <leitao at debian.org>