From: Ian Abbott <abbotti@mev.co.uk>
Date: Wed, 15 Aug 2012 14:02:45 +0000 (+0100)
Subject: staging: comedi: make attach handler optional
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~75^2~925
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8c3714d60c0b681179000e3e1b5aae15d99e6218;p=pandora-kernel.git

staging: comedi: make attach handler optional

Some low-level Comedi drivers no longer support manual configuration of
devices with the COMEDI_DEVCONFIG ioctl (used by the comedi_config
program).  For those drivers, the 'attach_pci' or 'attach_usb' handler
will be set in the struct comedi_driver to configure devices
automatically (via comedi_pci_auto_config() or
comedi_usb_auto_config()).  Their 'attach' handlers are redundant but
the the comedi core module currently requires it to be set.

Make the 'attach' handler optional and issue a warning if something
wants to call it.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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