From: Tejun Heo <htejun@gmail.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: jgarzik@pobox.com, axboe@suse.de, albertcc@tw.ibm.com,
forrest.zhao@intel.com, efalk@google.com,
linux-ide@vger.kernel.org
Subject: Re: [PATCH 08/11] sata_sil: convert to new EH
Date: Fri, 12 May 2006 01:10:27 +0900 [thread overview]
Message-ID: <446361F3.4040505@gmail.com> (raw)
In-Reply-To: <1147363974.26130.56.camel@localhost.localdomain>
Alan Cox wrote:
> On Gwe, 2006-05-12 at 00:45 +0900, Tejun Heo wrote:
>> a spurious interrupt or HSM violation. But, it sounds like it could
>> result in screaming IRQ for controllers without IRQ pending bit. Could
>> it? If so, maybe unconditional irq clearing in ata_interrupt() should
>> be resurrected to handle such conditions.
>
> Not sure how the sil24 handles it but the PATA chips seem (its not well
I'm pretty sure most modern controllers including sil24 drops IRQ once
masked. Also, as they have IRQ pending bit, such IRQs can easily be
cleared.
> documented) to drop any pending interrupt once it is masked, thus you
> would take the interrupt once (or maybe 2 or 3 times in weird obscure
> corner cases on a pentium II SMP box) and then no more.
So, they will drop interrupt after several unhandled IRQs at most even
if the driver doesn't read TF status register to clear it, right?
--
tejun
next prev parent reply other threads:[~2006-05-11 16:10 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-11 13:21 [PATCHSET 03/11] new EH implementation, take 3 Tejun Heo
2006-05-11 13:21 ` [PATCH 01/11] libata-eh: add ATA and libata flags for new EH Tejun Heo
2006-05-13 22:15 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 04/11] libata-eh: implement ata_eh_info and ata_eh_context Tejun Heo
2006-05-11 13:21 ` [PATCH 05/11] libata-eh: implement new EH Tejun Heo
2006-05-13 22:19 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 03/11] libata-eh: add per-dev ata_ering Tejun Heo
2006-05-11 13:21 ` [PATCH 02/11] libata-eh: implement ata_ering Tejun Heo
2006-05-13 22:16 ` Jeff Garzik
2006-05-13 23:36 ` Tejun Heo
2006-05-14 1:05 ` Jeff Garzik
2006-05-14 1:20 ` Tejun Heo
2006-05-14 1:32 ` Jeff Garzik
2006-05-14 1:38 ` Tejun Heo
2006-05-15 13:36 ` Alan Cox
2006-05-15 14:00 ` Tejun Heo
2006-05-15 14:25 ` Tejun Heo
2006-05-15 14:50 ` Alan Cox
2006-05-15 14:57 ` Tejun Heo
2006-05-15 15:19 ` Alan Cox
2006-05-15 15:19 ` Tejun Heo
2006-05-15 18:22 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 06/11] libata-eh: implement BMDMA EH Tejun Heo
2006-05-13 22:21 ` Jeff Garzik
2006-05-13 23:41 ` Tejun Heo
2006-05-15 13:38 ` Alan Cox
2006-05-15 13:59 ` Tejun Heo
2006-05-15 14:43 ` Alan Cox
2006-05-11 13:21 ` [PATCH 07/11] ata_piix: convert to new EH Tejun Heo
2006-05-13 22:23 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 08/11] sata_sil: " Tejun Heo
2006-05-11 14:22 ` Alan Cox
2006-05-11 14:39 ` Tejun Heo
2006-05-11 15:46 ` Alan Cox
2006-05-11 15:45 ` Tejun Heo
2006-05-11 16:12 ` Alan Cox
2006-05-11 16:10 ` Tejun Heo [this message]
2006-05-11 17:16 ` Alan Cox
2006-05-13 22:26 ` Jeff Garzik
2006-05-13 23:43 ` Tejun Heo
2006-05-11 13:21 ` [PATCH 10/11] ahci: add PIOS interim interrupt handling Tejun Heo
2006-05-11 13:21 ` [PATCH 11/11] sata_sil24: convert to new EH Tejun Heo
2006-05-11 13:21 ` [PATCH 09/11] ahci: " Tejun Heo
2006-05-13 10:53 ` Tejun Heo
2006-05-13 22:30 ` Jeff Garzik
2006-05-13 23:49 ` Tejun Heo
2006-05-13 22:34 ` [PATCHSET 03/11] new EH implementation, take 3 Jeff Garzik
2006-05-13 23:58 ` Tejun Heo
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