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staging: comedi: check comedi_auto_config() params

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Do some minimal error checking of the parameters of
`comedi_auto_config()`.  Just make sure the `hardware_device` and
`driver` parameters are non-NULL.

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>
This commit is contained in:
Ian Abbott 2013-04-04 14:58:42 +01:00 committed by Greg Kroah-Hartman
parent 7e1389a9e6
commit f08e0ac59a
1 changed files with 10 additions and 0 deletions
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10
drivers/staging/comedi/drivers.c
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@ -410,6 +410,16 @@ int comedi_auto_config(struct device *hardware_device,
struct comedi_device *comedi_dev;
int ret;
if (!hardware_device) {
pr_warn("BUG! comedi_auto_config called with NULL hardware_device\n");
return -EINVAL;
}
if (!driver) {
dev_warn(hardware_device,
"BUG! comedi_auto_config called with NULL comedi driver\n");
return -EINVAL;
}
if (!driver->auto_attach) {
dev_warn(hardware_device,
"BUG! comedi driver '%s' has no auto_attach handler\n",