From: Ian Abbott <abbotti@mev.co.uk>
Date: Fri, 25 Jul 2014 17:07:07 +0000 (+0100)
Subject: staging: comedi: amplc_dio200_common: prevent extra free_irq()
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~166^2~168
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a386149fb2bad23b5c6123894049ce3392bf76b5;p=pandora-kernel.git

staging: comedi: amplc_dio200_common: prevent extra free_irq()

`dio200_detach()` in "amplc_dio200.c" calls
`amplc_dio200_common_detach()` in "amplc_dio200_common.c", followed by
`comedi_legacy_detach()` in "../drivers.c".  Both of those functions
call `free_irq()` if `dev->irq` is non-zero.  The second call produces a
warning message because the handler has already been freed.  Prevent
that by setting `dev->irq = 0` in `amplc_dio200_common_detach()`.

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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