staging: comedi: adv_pci1710: clarify the 'act_chanlist'
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Tue, 20 Jan 2015 21:53:20 +0000 (14:53 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 25 Jan 2015 11:59:12 +0000 (19:59 +0800)
commit133dfbfb226db01d0548efcd712ba11c5f208922
tree542bb366dc75ee9996779a58b6ed62da8594093d
parente4451eeb456550d1fa1641ce369c1b914b02d225
staging: comedi: adv_pci1710: clarify the 'act_chanlist'

This driver saves the channel list of a scan in the private data and uses
that list to check analog input samples for data dropout.

Currently the channel numbers are shifted 12 bits so that they match the
channel number in the samples that are read from the board. All of the
shifts make the driver a bit harder to follow.

Store the channel numbers directly to the 'act_chanlist' and shift the
sample value instead when checking for the dropout. Add a comment for
clarity.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/drivers/adv_pci1710.c