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From: Lin Ming <ming.m.lin@intel.com>
To: Jeff Garzik <jgarzik@pobox.com>,
	Alan Stern <stern@rowland.harvard.edu>, Tejun Heo <tj@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
	linux-pm@vger.kernel.org, "Rafael J. Wysocki" <rjw@sisk.pl>
Subject: [RFC][PATCH 4/4] ahci: support hot plug when port/controller is runtime suspended
Date: Thu, 15 Dec 2011 21:12:49 +0800	[thread overview]
Message-ID: <1323954769-3918-5-git-send-email-ming.m.lin@intel.com> (raw)
In-Reply-To: <1323954769-3918-1-git-send-email-ming.m.lin@intel.com>

This is an empty patch now :)

I use eSATA to test disk hot plug.
With previous 3 patches applied, disk hot plug does not wok
when ahci port/controller is runtime suspended.

There are 2 cases we need to handle for hot plug:

1. port suspended, controller active
   Is IRQ need to be enabled for port to detect hot plug? 

2. port suspended, controller suspended
   Will controller get a PME when hot plug happens?

I'm still investigating hot plug support.

Anyone has comment?

Thanks,
Lin Ming

  parent reply	other threads:[~2011-12-15 13:12 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-15 13:12 [RFC][PATCH 0/4] ahci controller runtime PM support Lin Ming
2011-12-15 13:12 ` [RFC][PATCH 1/4] ahci: port legacy pm interface to struct dev_pm_ops Lin Ming
2011-12-15 19:53   ` Rafael J. Wysocki
2011-12-16 13:07     ` Lin Ming
2011-12-15 13:12 ` [RFC][PATCH 2/4] ahci: add runtime PM callbacks Lin Ming
2011-12-15 13:12 ` [RFC][PATCH 3/4] ata: runtime suspend port if no device attached Lin Ming
2011-12-15 13:12 ` Lin Ming [this message]
2011-12-15 19:21   ` [RFC][PATCH 4/4] ahci: support hot plug when port/controller is runtime suspended Tejun Heo
2011-12-15 23:29     ` Kay Sievers
2012-01-02 15:57     ` Matthew Garrett

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