From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Thu, 23 May 2013 20:05:19 +0000 (-0700)
Subject: staging: comedi: usbduxsigma: tidy up usbdux_ai_insn_read()
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~76^2~424
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c5db3b755ccf6bf046b5b5fa1b94cee1cf609bd8;p=pandora-kernel.git

staging: comedi: usbduxsigma: tidy up usbdux_ai_insn_read()

Rename the function so it has namespace associated with the driver.
Rename the local variable used for the private data pointer.

Return -EBUSY if an asynchronous command is running and the read cannot
be completed.

Propagate the errno if the receive_dux_command() fails.

Tidy up the function to make it more concise.

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>
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