From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Mon, 26 Jan 2015 23:17:19 +0000 (-0700)
Subject: staging: comedi: das16: use comedi_async 'scans_done' to detect EOA
X-Git-Tag: fixes-v4.0-rc1~99^2~122
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=42c44682a59a6ea38a301c20a4ec807c6fabdd02;p=pandora-kernel.git

staging: comedi: das16: use comedi_async 'scans_done' to detect EOA

Refactor das16_interrupt() to use the comedi_async 'scans_done' member to
detect the End-of-Acquisition for the async command. Use the helper function
comedi_nsamples_left() to determine if DMA needs to be restarted.

This allows the removal of the private data 'adc_byte_count' and fixes a
possible integer overflow issue when that value is calculated.

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>
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