From: Ian Abbott <abbotti@mev.co.uk>
Date: Fri, 10 May 2013 13:07:16 +0000 (+0100)
Subject: staging: comedi: complain if dma buffer allocation not supported
X-Git-Tag: v3.10-rc3~23^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9166139f6f829c2e7bf6695f13e08d09303d6ca;p=pandora-kernel.git

staging: comedi: complain if dma buffer allocation not supported

When allocating a buffer to support asynchronous comedi commands, if a
DMA coherent buffer was requested but `CONFIG_HAS_DMA` is undefined,
bail out of local helper function `__comedi_buf_alloc()` with an error
message.

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

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