Hi,
On Thu, Jan 24, 2019 at 04:07:41PM +0000, Russell King - ARM Linux admin wrote:
> On Thu, Jan 24, 2019 at 04:51:37PM +0100, Andrew Lunn wrote:
> > On Thu, Jan 24, 2019 at 02:18:03PM +0100, Thomas Bogendoerfer wrote:
> > >
> > > Fixes: 4bb043262878 ("net: mvpp2: phylink support")
> > > Signed-off-by: Thomas Bogendoerfer <tbogendoer...@suse.de>
> > > ---
> > > drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > index 16066c2d5b3a..0fbfe1945a69 100644
> > > --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > @@ -3405,7 +3405,7 @@ static int mvpp2_open(struct net_device *dev)
> > > valid = true;
> > > }
> > >
> > > - if (priv->hw_version == MVPP22 && port->link_irq && !port->phylink) {
> > > + if (priv->hw_version == MVPP22 && port->link_irq && port->phylink) {
> > > err = request_irq(port->link_irq, mvpp2_link_status_isr, 0,
> > > dev->name, port);
> > > if (err) {
>
> This still looks fishy to me. mvpp2_link_status_isr() has handling in
> it that is safe to be called for non-phylink cases, so presumably the
> right fix is to drop the "&& !port->phylink" completely?
That's right, mvpp2_link_status_isr() is safe to be called with or
without phylink being used. This IRQ is reporting the link status, and
is used when using in-band status or when phylink isn't used.
We do have a similar fix locally, which looks like:
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 2bcbf9caaf0d..6bab1824a1e4 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -3406,7 +3406,8 @@ static int mvpp2_open(struct net_device *dev)
valid = true;
}
- if (priv->hw_version == MVPP22 && port->link_irq && !port->phylink) {
+ if (priv->hw_version == MVPP22 && port->link_irq &&
+ (!port->phylink || !port->has_phy)) {
err = request_irq(port->link_irq, mvpp2_link_status_isr, 0,
dev->name, port);
if (err) {
We haven't submitted it yet, as we saw several issues when a port has no
PHY and is using the XLG MAC (so, not on the mcbin). We currently are
working on them.
I don't like to ask this, as you submitted the fix first, but I do think
we should hold back a bit while we figure out proper solutions. If you
need in-band status to be working properly, we could share out current
local branch so you can test and validate it do solve your issue.
Thanks!
Antoine
--
Antoine Ténart, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
