staging: comedi: dt9812: cleanup analog out subdevice (*insn_write)
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Tue, 14 May 2013 21:33:53 +0000 (14:33 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 16 May 2013 23:26:02 +0000 (16:26 -0700)
commit99928e654da031e5cbf537ab2e83997a1420e30c
tree16ba607e681ef7188a1080d0b9618c902b9cff8e
parente79f18e6b91a4f7b5cb9cef3c98721a6887c84ca
staging: comedi: dt9812: cleanup analog out subdevice (*insn_write)

For aesthetic reasons, rename the function to help with grepping and
rename some of the local vars.

The dt9812_analog_out() function can fail. Make sure to check for any
failure and return the errno.

The comedi core expects the (*insn_write) functions to return either
an errno or the number of samples written. Change the final return to
insn->n to make this clearer.

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>
drivers/staging/comedi/drivers/dt9812.c