On 21/11/2014 17:19, H Hartley Sweeten wrote:
Most of the comedi drivers that provide readback for write only subdevices now
use the comedi core comedi_alloc_subdev_readback() helper to allocate the 
subdevice
'reaback' member instead of using some member in their private data. These 
drivers
also hook up the (*insn_read) callback to the comedi_readback_insn_read() 
helper to
provide the readback.

Have the core automatically hook up the (*insn_read) callback after allocating 
the
memory if the driver has not already hooked it up to a private function.

Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
v2: Only hook up the default (*insn_read) if the driver has not already
     hooked it to a private function (suggested by Ian Abbott). The rest
     of this series is unchanged.

  drivers/staging/comedi/drivers.c                 | 4 ++++
  drivers/staging/comedi/drivers/addi_apci_3120.c  | 1 -
  drivers/staging/comedi/drivers/addi_apci_3501.c  | 1 -
  drivers/staging/comedi/drivers/addi_apci_3xxx.c  | 1 -
  drivers/staging/comedi/drivers/adl_pci6208.c     | 1 -
  drivers/staging/comedi/drivers/adl_pci9111.c     | 1 -
  drivers/staging/comedi/drivers/adl_pci9118.c     | 1 -
  drivers/staging/comedi/drivers/aio_aio12_8.c     | 1 -
  drivers/staging/comedi/drivers/amplc_pci224.c    | 1 -
  drivers/staging/comedi/drivers/amplc_pci230.c    | 1 -
  drivers/staging/comedi/drivers/cb_das16_cs.c     | 1 -
  drivers/staging/comedi/drivers/cb_pcidas.c       | 1 -
  drivers/staging/comedi/drivers/cb_pcidas64.c     | 1 -
  drivers/staging/comedi/drivers/cb_pcimdas.c      | 1 -
  drivers/staging/comedi/drivers/dac02.c           | 1 -
  drivers/staging/comedi/drivers/daqboard2000.c    | 1 -
  drivers/staging/comedi/drivers/das08.c           | 1 -
  drivers/staging/comedi/drivers/das16.c           | 1 -
  drivers/staging/comedi/drivers/dmm32at.c         | 1 -
  drivers/staging/comedi/drivers/dt2801.c          | 1 -
  drivers/staging/comedi/drivers/dt2811.c          | 1 -
  drivers/staging/comedi/drivers/dt282x.c          | 1 -
  drivers/staging/comedi/drivers/dt3000.c          | 1 -
  drivers/staging/comedi/drivers/fl512.c           | 1 -
  drivers/staging/comedi/drivers/icp_multi.c       | 1 -
  drivers/staging/comedi/drivers/ii_pci20kc.c      | 1 -
  drivers/staging/comedi/drivers/me4000.c          | 1 -
  drivers/staging/comedi/drivers/me_daq.c          | 1 -
  drivers/staging/comedi/drivers/mf6x4.c           | 1 -
  drivers/staging/comedi/drivers/multiq3.c         | 1 -
  drivers/staging/comedi/drivers/ni_670x.c         | 1 -
  drivers/staging/comedi/drivers/ni_at_ao.c        | 1 -
  drivers/staging/comedi/drivers/ni_atmio16d.c     | 1 -
  drivers/staging/comedi/drivers/ni_mio_common.c   | 1 -
  drivers/staging/comedi/drivers/pcl711.c          | 1 -
  drivers/staging/comedi/drivers/pcl726.c          | 1 -
  drivers/staging/comedi/drivers/pcl812.c          | 1 -
  drivers/staging/comedi/drivers/pcl818.c          | 1 -
  drivers/staging/comedi/drivers/pcmmio.c          | 1 -
  drivers/staging/comedi/drivers/quatech_daqp_cs.c | 1 -
  drivers/staging/comedi/drivers/rtd520.c          | 1 -
  drivers/staging/comedi/drivers/rti800.c          | 1 -
  drivers/staging/comedi/drivers/rti802.c          | 1 -
  drivers/staging/comedi/drivers/s526.c            | 1 -
  drivers/staging/comedi/drivers/s626.c            | 1 -
  45 files changed, 4 insertions(+), 44 deletions(-)

Reviewed-by: Ian Abbott <abbo...@mev.co.uk>

--
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbo...@mev.co.uk> )=-
-=(                          Web: http://www.mev.co.uk/  )=-
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