linux-kernel - Re: serial flow control appears broken

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Message-ID: <Pine.LNX.4.64N.0708031030020.28399@blysk.ds.pg.gda.pl>
Date:	Fri, 3 Aug 2007 10:32:43 +0100 (BST)
From:	"Maciej W. Rozycki" <macro@...ux-mips.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
cc:	Robert Hancock <hancockr@...w.ca>, Mark Lord <lkml@....ca>,
	Russell King <rmk+lkml@....linux.org.uk>,
	Lee Howard <faxguy@...ardsilvan.com>,
	linux-serial@...r.kernel.org, tytso@....edu,
	linux-kernel@...r.kernel.org
Subject: Re: serial flow control appears broken

On Thu, 2 Aug 2007, Alan Cox wrote:

> Currently libata PIO is mostly done in the IRQ path. Albert Lee was doing
> some work on that but its actually very hard to fix without doing polled
> PIO.

 Hmm, when the drive signals it is ready for a PIO data transfer can't 
just the interrupt handler mask the originating interrupt and post a 
softirq to handle the case?  That should be rather straightforward.

  Maciej
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