Re: [PATCH] Link change interrupt support to 8139cp ethernet driver

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Felipe W Damasio wrote:
> 	Hi,
> 
> 	According to Clifford Chiang <wrchiang@msx.realtek.com.tw>, the LinkChg
> is used just to inform the driver the link status has changed, the
> changes are automatically set.
> 
> 	Here's a patch against version 0.2.1.
> 
> 	Please consider pulling it from:
> 
> 	http://cscience.org/~felipewd/linux/patches-fwd/2.5/8139cp-LinkChg.patch
> 
> 	Comments?


You need to track link state by calling netif_carrier_on() and 
netif_carrier_off().  Initialize it in cp_open, and update it when you 
get a link change interrupt.

Also, I would rather you created a short inline function to handle the 
link change interrupt, rather than coding it in the main interrupt 
function itself.

Finally, don't forget there is a certain amount of "bounce" time during 
link change, so you need to test and see that link really is present 
when the link change interrupt is handled.  You might get a LinkChange 
interrupt before autonegotiation is complete.  So, at that instant, link 
would be down, so you always need to check after autonegotiation is 
complete.

	Jeff



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