[PATCH] net phy: poll for a link

[Eric Bénard]

Le Thu, 25 Oct 2012 11:11:06 +0200,
Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> a écrit :

> On 11:05 Thu 25 Oct     , Eric Bénard wrote:
> > Le Thu, 25 Oct 2012 10:49:02 +0200,
> > Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> a écrit :
> > 
> > > On 21:56 Wed 24 Oct     , Eric Bénard wrote:
> > > > Hi,
> > > > 
> > > > Le Wed, 24 Oct 2012 20:33:59 +0200,
> > > > Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> a écrit :
> > > > 
> > > > > On 20:06 Wed 24 Oct     , Sascha Hauer wrote:
> > > > > > Since we have phylib we have no instance which polls for a link. This
> > > > > > means that network boot often bails out after a powercycle or phy reset.
> > > > > > This changes the link status behaviour to:
> > > > > > 
> > > > > > - Always check for a link if the last link test was unsuccesful
> > > > > > - If the last check was succesful, check for a link when the last
> > > > > >   check is longer than 5 seconds ago
> > > > > > - Try to get a link for 5 seconds.
> > > > > 5 seconds is too long
> > > > > 
> > > > > and check the link is wrong you need to check the autoneg
> > > > > the link may be down because no cable
> > > > > 
> > > > and the autoneg can have been successful before the cable was
> > > > removed : how to you handle this cas ?
> > > the advertise tell you something change
> > > 
> > > so you need to restart the autoneg
> > > 
> > so I don't really understand why you don't want to use the link
> > information which seems to be the first thing to do before trying to
> > launch an autoneg but why not, let see the patches when they come.
> because if the link is down and the have no advertise meens the phy is really
> down and no need to wait
> 
under which conditions can you have link down and advertise at the same
time ?

Eric