Re: [PATCH 1/2] net: stmmac: Fix possible deadlock when disabling EEE support

Willem de Bruijn
2019-06-26T15:29:36Z

On Wed, Jun 26, 2019 at 6:45 AM Thierry Reding <thierry.reding@gmail.com> wrote:
>
> On Wed, Jun 26, 2019 at 11:23:21AM +0100, Jon Hunter wrote:
> > When stmmac_eee_init() is called to disable EEE support, then the timer
> > for EEE support is stopped and we return from the function. Prior to
> > stopping the timer, a mutex was acquired but in this case it is never
> > released and so could cause a deadlock. Fix this by releasing the mutex
> > prior to returning from stmmax_eee_init() when stopping the EEE timer.
> >
> > Fixes: 74371272f97f ("net: stmmac: Convert to phylink and remove phylib logic")
> > Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
> > ---
> > drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 1 +
> > 1 file changed, 1 insertion(+)
>
> Tested-by: Thierry Reding <treding@nvidia.com>

Acked-by: Willem de Bruijn <willemb@google.com>