As noted by Hartley in http://driverdev.linuxdriverproject.org/pipermail/driverdev-devel/2013-September/041560.html async command support (for the AI subdevice) is broken. This small series of patches should get it working. 1) staging: comedi: pcl711: add AI cancel handler 2) staging: comedi: pcl711: handle cmd->stop_src and stop_arg 3) staging: comedi: pcl711: put acquired data in buffer for AI command drivers/staging/comedi/drivers/pcl711.c | 35 +++++++++++++++++++++++++++------ 1 file changed, 29 insertions(+), 6 deletions(-) _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel