staging: comedi: s626: fix async command hookup
Only set the SDF_CMD_READ subdev_flag if the irq was sucessfully requested. Remove the unnecessary sanity check of dev->irq in s626_ai_cmd(). This callback is only hooked up if the irq is available. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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