* [PATCH] extcon: Check for incorrect connection type in notifier register @ 2016-06-23 7:53 ` Stephen Boyd 2016-06-23 10:40 ` Chanwoo Choi 0 siblings, 1 reply; 2+ messages in thread From: Stephen Boyd @ 2016-06-23 7:53 UTC (permalink / raw) To: linux-arm-kernel If we call extcon_register_notifier() with the wrong cable type, it blows up with an oops instead of returning an error code. Let's be nice and fail gracefully given that the consumer might not know if the cable is supported by the extcon provider. Signed-off-by: Stephen Boyd <stephen.boyd@linaro•org> --- drivers/extcon/extcon.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c index 21a123cadf78..161acb826334 100644 --- a/drivers/extcon/extcon.c +++ b/drivers/extcon/extcon.c @@ -586,6 +586,8 @@ int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, return -EINVAL; idx = find_cable_index_by_id(edev, id); + if (idx < 0) + return idx; spin_lock_irqsave(&edev->lock, flags); ret = raw_notifier_chain_register(&edev->nh[idx], nb); @@ -611,6 +613,8 @@ int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, return -EINVAL; idx = find_cable_index_by_id(edev, id); + if (idx < 0) + return idx; spin_lock_irqsave(&edev->lock, flags); ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); -- 2.9.0.rc2.8.ga28705d ^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH] extcon: Check for incorrect connection type in notifier register 2016-06-23 7:53 ` [PATCH] extcon: Check for incorrect connection type in notifier register Stephen Boyd @ 2016-06-23 10:40 ` Chanwoo Choi 0 siblings, 0 replies; 2+ messages in thread From: Chanwoo Choi @ 2016-06-23 10:40 UTC (permalink / raw) To: linux-arm-kernel Hi, On 2016? 06? 23? 16:53, Stephen Boyd wrote: > If we call extcon_register_notifier() with the wrong cable type, > it blows up with an oops instead of returning an error code. > Let's be nice and fail gracefully given that the consumer might > not know if the cable is supported by the extcon provider. > > Signed-off-by: Stephen Boyd <stephen.boyd@linaro•org> > --- > drivers/extcon/extcon.c | 4 ++++ > 1 file changed, 4 insertions(+) This patch has some merge conflict because the base branch is not on linux-next. But, Looks good to me. I applied it manually on extcon-next branch. Thanks, Chanwoo Choi ^ permalink raw reply [flat|nested] 2+ messages in thread
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2016-06-23 7:53 ` [PATCH] extcon: Check for incorrect connection type in notifier register Stephen Boyd
2016-06-23 10:40 ` Chanwoo Choi
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