| Message ID | 20210815164344.7796-1-digetx@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | viresh kumar |
| Headers | show |
| Series | [v1] opp: Drop empty-table checks from _put functions | expand |
On 15-08-21, 19:43, Dmitry Osipenko wrote: > The current_opp is released only when whole OPP table is released, > otherwise it's only marked as removed by dev_pm_opp_remove_table(). > Functions like dev_pm_opp_put_clkname() and dev_pm_opp_put_supported_hw() > are checking whether OPP table is empty and it's not if current_opp is > set since it holds the refcount of OPP, this produces a noisy warning > from these functions about busy OPP table. Remove the checks to fix it. > > Cc: stable@vger.kernel.org > Fixes: 81c4d8a3c414 ("opp: Keep track of currently programmed OPP") > Signed-off-by: Dmitry Osipenko <digetx@gmail.com> > --- > drivers/opp/core.c | 15 --------------- > 1 file changed, 15 deletions(-) > > diff --git a/drivers/opp/core.c b/drivers/opp/core.c > index b335c077f215..5543c54dacc5 100644 > --- a/drivers/opp/core.c > +++ b/drivers/opp/core.c > @@ -1856,9 +1856,6 @@ void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) > if (unlikely(!opp_table)) > return; > > - /* Make sure there are no concurrent readers while updating opp_table */ > - WARN_ON(!list_empty(&opp_table->opp_list)); > - > kfree(opp_table->supported_hw); > opp_table->supported_hw = NULL; > opp_table->supported_hw_count = 0; > @@ -1944,9 +1941,6 @@ void dev_pm_opp_put_prop_name(struct opp_table *opp_table) > if (unlikely(!opp_table)) > return; > > - /* Make sure there are no concurrent readers while updating opp_table */ > - WARN_ON(!list_empty(&opp_table->opp_list)); > - > kfree(opp_table->prop_name); > opp_table->prop_name = NULL; > > @@ -2056,9 +2050,6 @@ void dev_pm_opp_put_regulators(struct opp_table *opp_table) > if (!opp_table->regulators) > goto put_opp_table; > > - /* Make sure there are no concurrent readers while updating opp_table */ > - WARN_ON(!list_empty(&opp_table->opp_list)); > - > if (opp_table->enabled) { > for (i = opp_table->regulator_count - 1; i >= 0; i--) > regulator_disable(opp_table->regulators[i]); > @@ -2178,9 +2169,6 @@ void dev_pm_opp_put_clkname(struct opp_table *opp_table) > if (unlikely(!opp_table)) > return; > > - /* Make sure there are no concurrent readers while updating opp_table */ > - WARN_ON(!list_empty(&opp_table->opp_list)); > - > clk_put(opp_table->clk); > opp_table->clk = ERR_PTR(-EINVAL); > > @@ -2279,9 +2267,6 @@ void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table) > if (unlikely(!opp_table)) > return; > > - /* Make sure there are no concurrent readers while updating opp_table */ > - WARN_ON(!list_empty(&opp_table->opp_list)); > - > opp_table->set_opp = NULL; > > mutex_lock(&opp_table->lock); Applied. Thanks.
diff --git a/drivers/opp/core.c b/drivers/opp/core.c index b335c077f215..5543c54dacc5 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -1856,9 +1856,6 @@ void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) if (unlikely(!opp_table)) return; - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - kfree(opp_table->supported_hw); opp_table->supported_hw = NULL; opp_table->supported_hw_count = 0; @@ -1944,9 +1941,6 @@ void dev_pm_opp_put_prop_name(struct opp_table *opp_table) if (unlikely(!opp_table)) return; - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - kfree(opp_table->prop_name); opp_table->prop_name = NULL; @@ -2056,9 +2050,6 @@ void dev_pm_opp_put_regulators(struct opp_table *opp_table) if (!opp_table->regulators) goto put_opp_table; - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - if (opp_table->enabled) { for (i = opp_table->regulator_count - 1; i >= 0; i--) regulator_disable(opp_table->regulators[i]); @@ -2178,9 +2169,6 @@ void dev_pm_opp_put_clkname(struct opp_table *opp_table) if (unlikely(!opp_table)) return; - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - clk_put(opp_table->clk); opp_table->clk = ERR_PTR(-EINVAL); @@ -2279,9 +2267,6 @@ void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table) if (unlikely(!opp_table)) return; - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - opp_table->set_opp = NULL; mutex_lock(&opp_table->lock);
The current_opp is released only when whole OPP table is released, otherwise it's only marked as removed by dev_pm_opp_remove_table(). Functions like dev_pm_opp_put_clkname() and dev_pm_opp_put_supported_hw() are checking whether OPP table is empty and it's not if current_opp is set since it holds the refcount of OPP, this produces a noisy warning from these functions about busy OPP table. Remove the checks to fix it. Cc: stable@vger.kernel.org Fixes: 81c4d8a3c414 ("opp: Keep track of currently programmed OPP") Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- drivers/opp/core.c | 15 --------------- 1 file changed, 15 deletions(-)