From: Jeff Garzik <jgarzik@pobox.com>
To: Tejun Heo <htejun@gmail.com>
Cc: alan@lxorguk.ukuu.org.uk, axboe@suse.de, albertcc@tw.ibm.com,
lkosewsk@gmail.com, linux-ide@vger.kernel.org
Subject: Re: [PATCH 12/13] libata-hp: store attached SCSI device
Date: Thu, 27 Apr 2006 05:20:48 -0400 [thread overview]
Message-ID: <44508CF0.10105@pobox.com> (raw)
In-Reply-To: <1144764382410-git-send-email-htejun@gmail.com>
Tejun Heo wrote:
> Add device persistent field dev->sdev and store the attached SCSI
> device. With hotplug, libata needs to know the attached SCSI device
> to offline and detach it, but scsi_device_lookup() cannot be used
> because libata will reuse SCSI ID numbers - dead but not gone devices
> (due to zombie opens, etc...) interfere with the lookup.
>
> dev->sdev doesn't hold reference to the SCSI device. dev->sdev is
> cleared when the SCSI device goes away.
>
> Signed-off-by: Tejun Heo <htejun@gmail.com>
ACK, though we'll have to revisit once libata supports direct use of
block layer for ATA disks. But given other email it sounds like you are
thinking about this already.
Jeff
next prev parent reply other threads:[~2006-04-27 9:20 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-11 14:06 [PATCHSET 8/9] prep for hotplug support Tejun Heo
2006-04-11 14:06 ` [PATCH 01/13] libata-hp: separate out __ata_scsi_find_dev() Tejun Heo
2006-04-11 14:06 ` [PATCH 08/13] libata-hp: move device enable/disable out of ata_bus_probe() Tejun Heo
2006-04-11 14:06 ` [PATCH 04/13] libata-hp: make some fields of ata_device persistent Tejun Heo
2006-04-11 14:06 ` [PATCH 03/13] libata-hp: implement ata_dev_init() Tejun Heo
2006-04-11 14:06 ` [PATCH 02/13] libata-hp: add more SERR_* constants in preparation for hotplug support Tejun Heo
2006-04-11 14:06 ` [PATCH 05/13] libata-hp: call ata_dev_init() from ata_bus_probe() Tejun Heo
2006-04-11 14:06 ` [PATCH 06/13] libata-hp: prepare for persistent device flags Tejun Heo
2006-04-11 14:06 ` [PATCH 07/13] libata-hp: implement ap->orig_sata_spd_limit Tejun Heo
2006-04-27 9:19 ` Jeff Garzik
2006-04-27 10:18 ` Tejun Heo
2006-04-11 14:06 ` [PATCH 12/13] libata-hp: store attached SCSI device Tejun Heo
2006-04-27 9:20 ` Jeff Garzik [this message]
2006-04-11 14:06 ` [PATCH 11/13] libata-hp: add hotplug flags and flag handling functions Tejun Heo
2006-04-11 14:06 ` [PATCH 10/13] libata-hp: make ata_bus_probe() extern Tejun Heo
2006-04-11 14:06 ` [PATCH 09/13] libata-hp: prepare ata_bus_probe() for hotplug Tejun Heo
2006-04-11 14:06 ` [PATCH 13/13] libata-hp: add ata_hotplug_wq Tejun Heo
2006-04-13 6:11 ` zhao, forrest
2006-04-13 6:33 ` Tejun Heo
2006-04-12 1:41 ` [PATCHSET 8/9] prep for hotplug support Tejun Heo
2006-04-27 9:22 ` Jeff Garzik
2006-04-27 10:27 ` Tejun Heo
2006-04-27 10:36 ` Jeff Garzik
2006-04-27 10:47 ` Tejun Heo
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