[PATCH v10 2/8] opp: Allow dev_pm_opp_set_clkname() to replace released clock

The opp_table->clk is set to error once clock is released by
dev_pm_opp_put_clkname(). This doesn't allow to set clock again,
until OPP table is re-created from scratch. Check opp_table->clk
for both NULL and ERR_PTR to allow the clock's replacement.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 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 dde8a5cc948c..602e502d092e 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c

@@ -2146,7 +2146,7 @@ struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
 	}
 
 	/* clk shouldn't be initialized at this point */
-	if (WARN_ON(opp_table->clk)) {
+	if (WARN_ON(!IS_ERR_OR_NULL(opp_table->clk))) {
 		ret = -EBUSY;
 		goto err;
 	}

-- 
2.32.0