Re: [PATCH] 3c59x: read current link status from phy

[Bogdan Costescu]

On Wed, 7 Sep 2005, Jeff Garzik wrote:

> > The phy status register must be read twice in order to get the actual link
> > state.

Can the original poster give an explanation ? I've enjoyed a rather 
well functioning 3c59x driver for the past ~6 years without such 
double reading. Plus:
- this operation is I/O expensive
- it is performed inside a region protected by a spinlock
- it is performed often, every 60 seconds

Is there some specific hardware that exhibits a problem that is solved 
by this double reading ?

--
Bogdan Costescu

IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen
Universitaet Heidelberg, INF 368, D-69120 Heidelberg, GERMANY
Telephone: +49 6221 54 8869, Telefax: +49 6221 54 8868
E-mail: Bogdan.Costescu@xxxxxxxxxxxxxxxxxxxxx
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