From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Tue, 26 Aug 2014 00:55:51 +0000 (-0700)
Subject: staging: comedi: s626: tidy up freeing of the dma buffers
X-Git-Tag: fixes-for-v3.18-merge-window~15^2~991
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3757e79559534e722df93e184078a141dc0bcfa7;p=pandora-kernel.git

staging: comedi: s626: tidy up freeing of the dma buffers

Currently the dma buffers are freed during the detach of the driver using
the function s626_close_dma_b(). The buffers are also freed while the
interrupt handler is still attached. This could result in a race condition.

Refactor the code so that the buffers are freed after the interrupt handler
is released and the PCI device is disabled.

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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