From: Ian Abbott <abbotti@mev.co.uk>
Date: Wed, 19 May 2010 16:22:41 +0000 (+0100)
Subject: Staging: comedi: don't write to buffer if command finished
X-Git-Tag: v2.6.35-rc2~14^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d261154057c27f6c1d256b6198b0ad08733f1758;p=pandora-kernel.git

Staging: comedi: don't write to buffer if command finished

For write(), any data copied to the data buffer after the previously
set up streaming acquisition command has finished won't be used, but a
non-empty write() does not currently return 0 (or -EPIPE on error) after
the command has finished until the data buffer has been filled up.
Change this behavior to return 0 (or -EPIPE) any time after the command
has finished, without bothering to fill up the buffer with more useless
data.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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