RE: [EXT] Re: [PATCH] net: fec: fix ref count leaking when pm_runtime_get_sync fails

[Andy Duan]

From: David Miller <davem@xxxxxxxxxxxxx> Sent: Tuesday, June 16, 2020 4:42 AM
> From: Navid Emamdoost <navid.emamdoost@xxxxxxxxx>
> Date: Sun, 14 Jun 2020 00:38:01 -0500
> 
> > in fec_enet_mdio_read, fec_enet_mdio_write, fec_enet_get_regs,
> > fec_enet_open and fec_drv_remove, pm_runtime_get_sync is called which
> > increments the counter even in case of failure, leading to incorrect
> > ref count. In case of failure, decrement the ref count before returning.
> >
> > Signed-off-by: Navid Emamdoost <navid.emamdoost@xxxxxxxxx>
> 
> This does not apply to the net tree.

Wolfram Sang wonder if such de-reference can be better handled by pm runtime core code.
https://lkml.org/lkml/2020/6/14/76