On Fri, 6 Nov 2020 at 12:46, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote:
>
> On 05-11-20, 11:24, Rob Clark wrote:
> > On Tue, Nov 3, 2020 at 7:04 PM Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote:
> > >
> > > On 03-11-20, 08:50, Rob Clark wrote:
> > > > sorry, it didn't apply cleanly (which I guess is due to some other
> > > > dependencies that need to be picked back to v5.4 product kernel), and
> > > > due to some other things I'm in middle of debugging I didn't have time
> > > > yet to switch to v5.10-rc or look at what else needs to
> > > > cherry-picked..
> > > >
> > > > If you could, pushing a branch with this patch somewhere would be a
> > > > bit easier to work with (ie. fetch && cherry-pick is easier to deal
> > > > with than picking things from list)
> > >
> > > It has been in linux-next for a few days. Here is the HEAD to pick
> > > from. There are few patches there since rc1.
> > >
> > > commit 203e29749cc0 ("opp: Allocate the OPP table outside of opp_table_lock")
> > >
> >
> > sorry for the delay, with that cherry-picked, I'm getting a whole lot of:
>
> Ahh, sorry about that and thanks for reporting it. Here is the fix:
>
> diff --git a/drivers/opp/of.c b/drivers/opp/of.c
> index c718092757d9..6b7f0066942d 100644
> --- a/drivers/opp/of.c
> +++ b/drivers/opp/of.c
> @@ -112,8 +112,6 @@ static struct opp_table *_find_table_of_opp_np(struct device_node *opp_np)
> struct opp_table *opp_table;
> struct device_node *opp_table_np;
>
> - lockdep_assert_held(&opp_table_lock);
> -
> opp_table_np = of_get_parent(opp_np);
> if (!opp_table_np)
> goto err;
> @@ -121,12 +119,15 @@ static struct opp_table *_find_table_of_opp_np(struct device_node *opp_np)
> /* It is safe to put the node now as all we need now is its address */
> of_node_put(opp_table_np);
>
> + mutex_lock(&opp_table_lock);
> list_for_each_entry(opp_table, &opp_tables, node) {
> if (opp_table_np == opp_table->np) {
> _get_opp_table_kref(opp_table);
> + mutex_unlock(&opp_table_lock);
> return opp_table;
> }
> }
> + mutex_unlock(&opp_table_lock);
>
> err:
> return ERR_PTR(-ENODEV);
Ping.
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