We need to make sure if pm_runtime_get_sync() is designed with such behavior before modifying it. I received a response from Rafael when I commited a similar patch: https://lkml.org/lkml/2020/5/20/1100 It seems that this behavior is intentional and needs to be kept. Regards, Dinghao "Dan Carpenter" <dan.carpenter@xxxxxxxxxx>写道： > On Thu, May 21, 2020 at 02:27:45PM +0800, Dinghao Liu wrote: > > pm_runtime_get_sync() increments the runtime PM usage counter even > > the call returns an error code. Thus a pairing decrement is needed > > on the error handling path to keep the counter balanced. > > > > Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx> > > Let's stop working around the bug in pm_runtime_get_sync() and write > a replacement for it instead. > > regards, > dan carpenter
