From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Parallel ATA with libata status with the patches I'm working on
Date: Sun, 06 Nov 2005 20:41:31 +0000 [thread overview]
Message-ID: <1131309691.1212.32.camel@localhost.localdomain> (raw)
In-Reply-To: <1131141030.29195.18.camel@gaston>
On Sad, 2005-11-05 at 08:50 +1100, Benjamin Herrenschmidt wrote:
> OK, but my question why, what is the reason why we need IRQ mask ? Some
> old non-PCI controllers can't grok un-related ISA IO cycles during a
> FIFO read/write ? I suppose those would be broken on SMP too (though I
> suspect then that those don't exist as SMP machines then :)
There are PCI controllers that are hosed too. They incorrectly handle
the situation where the PCI fifo empties/fills and the controller should
indicate to the drive to stall the transfer. The chipsets I know that
are afflicted with this are all uniprocessor mainboard devices.
Alan
prev parent reply other threads:[~2005-11-06 20:11 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-03 14:54 Parallel ATA with libata status with the patches I'm working on Alan Cox
2005-11-03 14:48 ` Russell King
2005-11-03 15:02 ` Bartlomiej Zolnierkiewicz
2005-11-03 15:28 ` David S. Miller
2005-11-03 15:48 ` Bartlomiej Zolnierkiewicz
2005-11-03 16:27 ` Alan Cox
2005-11-03 15:56 ` Alan Cox
2005-11-03 20:55 ` Krzysztof Halasa
2005-11-03 21:29 ` Bartlomiej Zolnierkiewicz
2005-11-03 22:29 ` Krzysztof Halasa
2005-11-03 22:48 ` Bartlomiej Zolnierkiewicz
2005-11-03 22:54 ` Alan Cox
2005-11-04 1:30 ` Rogério Brito
2005-11-04 13:38 ` Alan Cox
2005-11-04 13:41 ` Alan Cox
2005-11-04 23:10 ` Russell King
2005-11-04 23:19 ` Benjamin Herrenschmidt
2005-11-03 15:58 ` Alan Cox
2005-11-03 15:30 ` Russell King
2005-11-03 16:23 ` Alan Cox
2005-11-04 3:35 ` Jeff Garzik
2005-11-04 3:35 ` Jeff Garzik
2005-11-04 8:43 ` Xavier Bestel
2005-11-03 14:58 ` Bartlomiej Zolnierkiewicz
2005-11-03 15:49 ` Alan Cox
2005-11-03 15:34 ` Bartlomiej Zolnierkiewicz
2005-11-04 0:14 ` Mark Lord
2005-11-04 0:17 ` Mark Lord
2005-11-04 1:18 ` Alan Cox
2005-11-04 3:49 ` Jeff Garzik
2005-11-05 22:31 ` Mark Lord
2005-11-04 6:43 ` Benjamin Herrenschmidt
2005-11-04 7:00 ` Jeff Garzik
2005-11-04 13:34 ` Alan Cox
2005-11-04 21:50 ` Benjamin Herrenschmidt
2005-11-06 20:41 ` Alan Cox [this message]
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