From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Tue, 4 Nov 2014 17:54:33 +0000 (-0700)
Subject: staging: comedi: addi_apci_3120: fix apci3120_ai_insn_read()
X-Git-Tag: omap-for-v3.19/fixes-rc1~73^2~306
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=89e9057b50369474c1e701faccdeedf08566ec57;p=pandora-kernel.git

staging: comedi: addi_apci_3120: fix apci3120_ai_insn_read()

Now that the scanning and interrupt support have been removed from this
function it can be refactored to work correctly.

The comedi core expects (*insn_read) functions to read insn->n values
from the hardware and return the number of samples read. This function
currently just reads one sample but it returns insn->n.

Fix this function to work like the core expects.

Use comedi_timeout() to prevent a possible deadlock in the loop that
waits for the end-of-conversion.

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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