opp: Don't ignore clk_get() errors other than -ENOENT

Not all devices that need to use OPP core need to have clocks, a missing
clock is fine in which case -ENOENT shall be returned by clk_get().

Anything else is an error and must be handled properly.

Reported-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index a518173..dc95d29 100644 (file)
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1252,6 +1252,8 @@ static struct opp_table *_update_opp_table_clk(struct device *dev,
                                               struct opp_table *opp_table,
                                               bool getclk)
 {
+       int ret;
+
        /*
         * Return early if we don't need to get clk or we have already tried it
         * earlier.
@@ -1261,18 +1263,20 @@ static struct opp_table *_update_opp_table_clk(struct device *dev,
 
        /* Find clk for the device */
        opp_table->clk = clk_get(dev, NULL);
-       if (IS_ERR(opp_table->clk)) {
-               int ret = PTR_ERR(opp_table->clk);
 
-               if (ret == -EPROBE_DEFER) {
-                       dev_pm_opp_put_opp_table(opp_table);
-                       return ERR_PTR(ret);
-               }
+       ret = PTR_ERR_OR_ZERO(opp_table->clk);
+       if (!ret)
+               return opp_table;
 
+       if (ret == -ENOENT) {
                dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret);
+               return opp_table;
        }
 
-       return opp_table;
+       dev_pm_opp_put_opp_table(opp_table);
+       dev_err_probe(dev, ret, "Couldn't find clock\n");
+
+       return ERR_PTR(ret);
 }
 
 /*