From a4501bac0e553bed117b7e1b166d49731caf7260 Mon Sep 17 00:00:00 2001 From: Rajendra Nayak Date: Mon, 10 Aug 2020 12:36:19 +0530 Subject: [PATCH] opp: Enable resources again if they were disabled earlier dev_pm_opp_set_rate() can now be called with freq = 0 in order to either drop performance or bandwidth votes or to disable regulators on platforms which support them. In such cases, a subsequent call to dev_pm_opp_set_rate() with the same frequency ends up returning early because 'old_freq == freq' Instead make it fall through and put back the dropped performance and bandwidth votes and/or enable back the regulators. Cc: v5.3+ # v5.3+ Fixes: cd7ea582866f ("opp: Make dev_pm_opp_set_rate() handle freq = 0 to drop performance votes") Reported-by: Sajida Bhanu Reviewed-by: Sibi Sankar Reported-by: Matthias Kaehlcke Tested-by: Matthias Kaehlcke Reviewed-by: Stephen Boyd Signed-off-by: Rajendra Nayak [ Viresh: Don't skip clk_set_rate() and massaged changelog ] Signed-off-by: Viresh Kumar --- drivers/opp/core.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/opp/core.c b/drivers/opp/core.c index bdb028c..9668ea0 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -934,10 +934,13 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) /* Return early if nothing to do */ if (old_freq == freq) { - dev_dbg(dev, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n", - __func__, freq); - ret = 0; - goto put_opp_table; + if (!opp_table->required_opp_tables && !opp_table->regulators && + !opp_table->paths) { + dev_dbg(dev, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n", + __func__, freq); + ret = 0; + goto put_opp_table; + } } /* -- 2.7.4