From: Alan Stern <stern@rowland.harvard.edu>
Date: Wed, 17 Jan 2007 07:28:48 +0000 (-0800)
Subject: USB: gadgetfs AIO tweaks
X-Git-Tag: v2.6.21-rc2~42^2~9^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49631ca7f3e2fd05186028b453fa27f75b830de7;p=pandora-kernel.git

USB: gadgetfs AIO tweaks

This patch (as837) fixes several mistakes in the AIO interface of the
gadgetfs driver:

	The ki_retry method is not supposed to do a put on the kiocb.
	The extra call to aio_put_req() causes memory corruption.
	(Note: This call was removed before, by patch as691, and then
	mysteriously re-introduced later.)

	Even if a read transfer is cancelled, we can and should send
	to the user all the data that did manage to get transferred.

	Testing for AIO cancellation in the I/O completion handler
	is both racy and (now) unnecessary.  aio_complete() does its
	own checking, in a safe manner.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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