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(parent: da71751) | patch
staging: comedi: restrict comedi_set_hw_dev() usage
authorIan Abbott <abbotti@mev.co.uk>
Fri, 1 Feb 2013 13:23:20 +0000 (13:23 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 4 Feb 2013 01:44:20 +0000 (17:44 -0800)
commitde06d7c6b8e3b886eec0302ecbadf76944a42ca4
treeda56c9e3aadd7278b9ddde550f09db348f4bcc11tree | snapshot
parentda71751177f35f0ca5494968cc237511c423a744commit | diff
staging: comedi: restrict comedi_set_hw_dev() usage

Don't allow comedi drivers to change `dev->hw_dev` using
`comedi_set_hw_dev()` if it's already been set.  Return `-EEXIST` in
that case.

`dev->hw_dev` needs to be set to NULL by the core during clean-up of the
comedi device, so add a local function `comedi_clear_hw_dev()` to do
that.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/drivers.c diff | blob | history
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