From: Tejun Heo <htejun@gmail.com>
To: Jeff Garzik <jeff@garzik.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux-ide@vger.kernel.org, Forrest Zhao <forrest.zhao@gmail.com>
Subject: Re: [PATCH 11/12] libata: schedule probing after SError access failure during autopsy
Date: Wed, 04 Jul 2007 00:05:06 +0900 [thread overview]
Message-ID: <468A65A2.2060503@gmail.com> (raw)
In-Reply-To: <468A5ECE.3010009@garzik.org>
Jeff Garzik wrote:
> Tejun Heo wrote:
>> If SError isn't accessible, EH can't tell whether hotplug has happened
>> or not. Report SError read failure with AC_ERR_OTHER and schedule
>> probing with hardreset. This will be mainly useful for PMPs.
>>
>> Signed-off-by: Tejun Heo <htejun@gmail.com>
>> ---
>> drivers/ata/libata-eh.c | 6 +++++-
>> 1 files changed, 5 insertions(+), 1 deletions(-)
>
> What if the LLDD told us hotplug happened?
>
> Even though sata_promise has SError, it should be noted that hotplug
> under sata_promise is not signalled through normal means, but by a
> special vendor-specific register
Those two are independent and doesn't interfere with each other. This
is just safeguard against PMP SCR read failures which might or might not
imply phy event. ie. it's just another source of hotplug event.
--
tejun
next prev parent reply other threads:[~2007-07-03 15:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-01 9:53 [PATCHSET 1/4] libata: misc updates in preparation of PMP support Tejun Heo
2007-07-01 9:53 ` [PATCH 01/12] libata: update EH report formatting Tejun Heo
2007-07-03 14:22 ` Jeff Garzik
2007-07-03 15:02 ` Tejun Heo
2007-07-01 9:53 ` [PATCH 05/12] ahci: implement SCR_NOTIFICATION r/w Tejun Heo
2007-07-03 14:31 ` Jeff Garzik
2007-07-03 15:00 ` Tejun Heo
2007-07-13 11:53 ` Tejun Heo
2007-07-01 9:53 ` [PATCH 03/12] libata: make ->scr_read/write callbacks return error code Tejun Heo
2007-07-03 14:26 ` Jeff Garzik
2007-07-01 9:53 ` [PATCH 02/12] libata: implement AC_ERR_NCQ Tejun Heo
2007-07-03 14:24 ` Jeff Garzik
2007-07-03 14:58 ` Tejun Heo
2007-07-01 9:53 ` [PATCH 04/12] ahci: make NO_NCQ handling more consistent Tejun Heo
2007-07-03 14:28 ` Jeff Garzik
2007-07-01 9:53 ` [PATCH 12/12] libata: implement EH fast drain Tejun Heo
2007-07-03 14:37 ` Jeff Garzik
2007-07-03 15:09 ` Tejun Heo
2007-07-01 9:53 ` [PATCH 09/12] libata: reorganize ata_ehi_hotplugged() Tejun Heo
2007-07-01 9:53 ` [PATCH 07/12] libata: quickly trigger SATA SPD down after debouncing failed Tejun Heo
2007-07-01 9:53 ` [PATCH 11/12] libata: schedule probing after SError access failure during autopsy Tejun Heo
2007-07-03 14:35 ` Jeff Garzik
2007-07-03 15:05 ` Tejun Heo [this message]
2007-07-01 9:53 ` [PATCH 08/12] libata: improve SCSI scan failure handling Tejun Heo
2007-07-01 9:53 ` [PATCH 10/12] libata: clear HOTPLUG flag after a reset Tejun Heo
2007-07-03 14:34 ` Jeff Garzik
2007-07-01 9:53 ` [PATCH 06/12] libata: improve SATA PHY speed down logic Tejun Heo
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