[PATCH] opp: Allow dev_pm_opp_set_opp() to be called without opp

[Bjorn Andersson]

a6xx_gmu_stop() calls dev_pm_opp_set_opp() with NULL as opp in order to
drop its bandwidth request, which was valid with dev_pm_opp_set_bw().
But after the transition to dev_pm_opp_set_opp() this leads to a NULL
dereference before jumping into _set_opp(), which does disable the
vote as expected.

Fixes: a0d67b94e2ef ("opp: Implement dev_pm_opp_set_opp()")
Signed-off-by: Bjorn Andersson <bjorn.anders...@linaro.org>
---
 drivers/opp/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 583bb1274df9..3ff05f40e443 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1157,7 +1157,7 @@ int dev_pm_opp_set_opp(struct device *dev, struct 
dev_pm_opp *opp)
                return PTR_ERR(opp_table);
        }
 
-       ret = _set_opp(dev, opp_table, opp, opp->rate);
+       ret = _set_opp(dev, opp_table, opp, opp ? opp->rate : 0);
        dev_pm_opp_put_opp_table(opp_table);
 
        return ret;
-- 
2.29.2