staging: comedi: dt282x: tidy up the irq support in dt282x_attach()
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Tue, 26 Nov 2013 23:41:59 +0000 (16:41 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 3 Dec 2013 17:20:21 +0000 (09:20 -0800)
commit06551fda7e0f07250884c0cf47d1286da0a5651c
treea570007ef70aa5065637836bd0cf33f1d302b847
parent5b7b0eb2b208d3ecdaf946876f6c0f9cf292ddf2
staging: comedi: dt282x: tidy up the irq support in dt282x_attach()

An irq is only needed by this driver in order to support async commands.
Since it is optional, modify the attach so that if the request_irq() fails
the attach does not fail.

Remove the printk noise about the irq.

Only hookup the async command support if the request_irq() was successful.

Also, only call dt282x_grab_dma() if we have an irq since interrupt support
is needed to support dma.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/drivers/dt282x.c