From: Alan Stern <stern@rowland.harvard.edu>
Date: Tue, 3 Sep 2013 17:58:43 +0000 (-0400)
Subject: USB: see if URB comes from a completion handler
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~66^2~186
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c7ccde6eac6d3c4bc6110cc3fd76ef3823bc0831;p=pandora-kernel.git

USB: see if URB comes from a completion handler

Now that URBs can be completed inside tasklets, we need a way of
determining whether a completion handler for a given endpoint is
currently running.  Otherwise it's not possible to maintain the API
guarantee about keeping isochronous streams synchronous when an
underrun occurs.

This patch adds a field and a routine to check whether a completion
handler for a periodic endpoint is running.  At the moment no
analogous routine appears to be necessary for async endpoints, but one
can always be added.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

Reading git-diff-tree failed