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>
1 file changed