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Subject[PATCH 4.19 127/313] OPP: Use opp_table->regulators to verify no regulator case
Date
4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit 90e3577b5feb42bac1269e16bb3d2bdd8f6df40f ]

The value of opp_table->regulator_count is not very consistent right now
and it may end up being 0 while we do have a "opp-microvolt" property in
the OPP table. It was kept that way as we used to check if any
regulators are set with the OPP core for a device or not using value of
regulator_count.

Lets use opp_table->regulators for that purpose as the meaning of
regulator_count is going to change in the later patches.

Reported-by: Quentin Perret <quentin.perret@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 31ff03dbeb83..f3433bf47b10 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -191,12 +191,12 @@ unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
if (IS_ERR(opp_table))
return 0;

- count = opp_table->regulator_count;
-
/* Regulator may not be required for the device */
- if (!count)
+ if (!opp_table->regulators)
goto put_opp_table;

+ count = opp_table->regulator_count;
+
uV = kmalloc_array(count, sizeof(*uV), GFP_KERNEL);
if (!uV)
goto put_opp_table;
@@ -976,6 +976,9 @@ static bool _opp_supported_by_regulators(struct dev_pm_opp *opp,
struct regulator *reg;
int i;

+ if (!opp_table->regulators)
+ return true;
+
for (i = 0; i < opp_table->regulator_count; i++) {
reg = opp_table->regulators[i];

@@ -1263,7 +1266,7 @@ static int _allocate_set_opp_data(struct opp_table *opp_table)
struct dev_pm_set_opp_data *data;
int len, count = opp_table->regulator_count;

- if (WARN_ON(!count))
+ if (WARN_ON(!opp_table->regulators))
return -EINVAL;

/* space for set_opp_data */
--
2.19.1


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