On Tue, 2014-11-04 at 20:09 +0000, Charles Keepax wrote:
> On Tue, Nov 04, 2014 at 11:23:06AM +0100, Stam, Michel [FINT] wrote:
> > Hello Riku,
> >
> > >Fixing a bug (ethtool support) must not cause breakage elsewhere (in
> > this case on arndale). This is now a regression of functionality from
> > 3.17.
> > >
> > >I think it would better to revert the change now and with less hurry
> > introduce a ethtool fix that doesn't break arndale.
> >
> > I don't fully agree here;
> > I would like to point out that this commit is a revert itself. Fixing
> > the armdale will then cause breakage in other implementations, such as
> > ours. Blankly reverting breaks other peoples' implementations.
> >
> > The PHY reset is the thing that breaks ethtool support, so any fix that
> > appeases all would have to take existing PHY state into account.
[...]
> --- a/drivers/net/usb/asix_devices.c
> +++ b/drivers/net/usb/asix_devices.c
> @@ -299,6 +299,7 @@ static int ax88772_reset(struct usbnet *dev)
> {
> struct asix_data *data = (struct asix_data *)&dev->data;
> int ret, embd_phy;
> + int reg;
> u16 rx_ctl;
>
> ret = asix_write_gpio(dev,
> @@ -359,8 +360,10 @@ static int ax88772_reset(struct usbnet *dev)
> msleep(150);
>
> asix_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
> - asix_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
> - ADVERTISE_ALL | ADVERTISE_CSMA);
> + reg = asix_mdio_read(dev->net, dev->mii.phy_id, MII_ADVERTISE);
> + if (!reg)
> + reg = ADVERTISE_ALL | ADVERTISE_CSMA;
> + asix_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, reg);
[...]
Why is there no sleep after setting the RESET bit? Doesn't that make
the following register writes unreliable?
Ben.
--
Ben Hutchings
Experience is directly proportional to the value of equipment destroyed.
- Carolyn Scheppner
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