---559023410-684387517-917541854=:1134
Content-Type: TEXT/PLAIN; charset=US-ASCII
here is a diff to apply to /drivers/net/plip.c since it was broken in
2.2.0 and I couldn't make much use of my systems here without it. any
suggestions, flames and beers are welcome.
It's all documented in the source, enjoy.
On Thu, 28 Jan 1999, Alexander Viro wrote:
>
>
> On Thu, 28 Jan 1999, Shaun Wilson wrote:
>
> > It seems taht for whatever reason teh first patch extends teh time which
> > teh interface remains functional, oterh than that, I'm at a loss because I
> > can't see anything besides two macros and a new HS_TIMEOUT define that is
> > new to plip.c
> >
> > I've emailed the maintainer before(gniibe@*.jp) and received no response,
> > so if anyone knows what the purpose behind HS_TIMEOUT is please fill me
> > in, afaik it's nothing more than a method of capturing a timeout specific
> > to the transmit operation, which would also be my problem.
>
> HS_TIMEOUT is the result of rebalancing enable/disable_irq()
> stuff. When somebody (Andrea?) changed enable/disable_irq() semantics old
> PLIP code broke. These days disable_irq();disable_irq();enable_irq();
> leaves IRQ *disabled*, not enabled as it used to do. Now, we need to
> have equal amounts of eanble_irq() and disable_irq() on every loop. If
> you'll look at sending part you'll see that there are two kinds of exits -
> ones from the handshaking phase vs. everything else. They leave different
> number of disable_irq() to undo. Hence the special return value - it
> allows to compensate the stuff in error recovery.
> Look for my posting on l-k ([PATCH] plip breakage (2.2.0-pre1))
> and comments in drivers/net/plip.c (line 382) for details.
> Be *very* accurate with irq stuff - rules had been changed here.
>
>
> -
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> Please read the FAQ at http://www.tux.org/lkml/
>
---559023410-684387517-917541854=:1134
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