From: Tilman Schmidt <tilman@imap.cc>
To: Alan Stern <stern@rowland.harvard.edu>,
Greg Kroah-Hartman <gregkh@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-usb-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org
Subject: [PATCH] USB: power-management.txt - disconnect clarification
Date: Mon, 12 Nov 2007 10:55:35 +0100 (CET) [thread overview]
Message-ID: <20071112095535.B778111004B@xenon.ts.pxnet.com> (raw)
From: Tilman Schmidt <tilman@imap.cc>
Add a paragraph to Documentation/usb/power-management.txt about the
interaction between suspend and disconnect.
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
---
--- linux-2.6/Documentation/usb/power-management.txt 2007-10-14 00:41:08.000000000 +0200
+++ linux-2.6.24-rc2-work/Documentation/usb/power-management.txt 2007-11-12 10:27:30.000000000 +0100
@@ -278,6 +278,12 @@
(although the interfaces will be in the same altsettings as
before the suspend).
+If the device is disconnected or powered down while it is suspended,
+the disconnect method will be called instead of the resume or
+reset_resume method. This will also happen if the system is resumed
+from hibernation, as the device could have been disconnected without
+the system being able to detect it.
+
The reset_resume method is used by the USB Persist facility (see
Documentation/usb/persist.txt) and it can also be used under certain
circumstances when CONFIG_USB_PERSIST is not enabled. Currently, if a
next reply other threads:[~2007-11-12 10:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-12 9:55 Tilman Schmidt [this message]
2007-11-12 19:42 ` Alan Stern
2007-11-15 21:33 ` Tilman Schmidt
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