On Thursday, May 29, 2014 9:42 PM, Chase Southwood wrote: > The addi-data drivers use send_sig() to let the user know when an > interrupt has occurred. The "standard" way to do this in the comedi > subsystem is to have a subdevice that supports asynchronous commands > and use comedi_event() to signal the user. > > Remove the send_sig() usage in this driver. > > Signed-off-by: Chase Southwood <chase.southw...@gmail.com> > Cc: Ian Abbott <abbo...@mev.co.uk> > Cc: H Hartley Sweeten <hswee...@visionengravers.com> > --- > .../comedi/drivers/addi-data/hwdrv_apci1564.c | 23 > ---------------------- > 1 file changed, 23 deletions(-)
Chase, Normally this patch might be a problem. With this patch you remove the mechanism that the driver uses to signal the user that an event has occurred without providing a new mechanism. In theory this "breaks" the driver. In reality, the driver is already "broke" since the interrupts are currently enabled using the digital input subdevice (*insn_config) callback and that callback does not follow the comedi API. Currently the apci1564_di_config() function is using the data[0] value as a flag to enable/disable the interrupt instead of using it as the comedi configuration instruction. It is expecting data[0] to be 1 or 0, when it is 1 it expects the data to include 3 additional parameters but the core will sanity check the instruction length and return -EINVAL if insn->n != 1. You fix this in patch 5/6. Because the driver is already "broke" I guess this patch is ok. Reviewed-by: H Hartley Sweeten <hswee...@visionengravers.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
