linux-kernel - Re: serial flow control appears broken

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Message-id: <46B20E12.4020700@shaw.ca>
Date:	Thu, 02 Aug 2007 11:02:10 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Mark Lord <lkml@....ca>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	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

Alan Cox wrote:
>> I think that PIO transfers only have to be done with interrupts disabled 
>> on really old, evil controllers (without unmask set). I don't think 
>> libata ever disables interrupts during transfers(?)
> 
> 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.

Ah, right. Misread the code.
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