From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 12 Jul 2013 08:04:18 +0000 (+0200)
Subject: usbfs: Allow printer class 'get_device_id' without needing to claim the intf
X-Git-Tag: v3.12-rc1~186^2~147
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5dc50c357d5ce8f78e148d20a38e4e66b12d550f;p=pandora-kernel.git

usbfs: Allow printer class 'get_device_id' without needing to claim the intf

For certain (HP) printers the printer device_id does not only contain a
static part identifying the printer, but it also contains a dynamic part
giving printer status, ink level, etc.

To get to this info various userspace utilities need to be able to make a
printer class 'get_device_id' request without first claiming the interface
(as that is in use for the actual printer driver).

Since the printer class 'get_device_id' request does not change interface
settings in anyway, allowing this without claiming the interface should not
cause any issues.

CC: Sanjay Kumar <sanjay.kumar14@hp.com>
CC: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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