PM / OPP: Fix static checker warning (broken 64bit big endian systems)

Dan Carpenter reported (generated with static checker):

drivers/base/power/opp.c:949 _opp_add_static_v2()
warn: passing casted pointer '&new_opp->clock_latency_ns' to
'of_property_read_u32()' 64 vs 32.

This code will break on 64 bit, big endian machines.

Fix this by reading the value in a u32 type variable first and then
assigning it to the unsigned long variable.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Suggested-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index 4d6c4576f7ae..803d8b7ced89 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c
@@ -918,6 +918,7 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
         struct device_opp *dev_opp;
         struct dev_pm_opp *new_opp;
         u64 rate;
+        u32 val;
         int ret;
 
         /* Hold our list modification lock here */
@@ -946,14 +947,16 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
         new_opp->np = np;
         new_opp->dynamic = false;
         new_opp->available = true;
-        of_property_read_u32(np, "clock-latency-ns",
-                             (u32 *)&new_opp->clock_latency_ns);
+
+        if (!of_property_read_u32(np, "clock-latency-ns", &val))
+                new_opp->clock_latency_ns = val;
 
         ret = opp_get_microvolt(new_opp, dev);
         if (ret)
                 goto free_opp;
 
-        of_property_read_u32(np, "opp-microamp", (u32 *)&new_opp->u_amp);
+        if (!of_property_read_u32(new_opp->np, "opp-microamp", &val))
+                new_opp->u_amp = val;
 
         ret = _opp_add(dev, new_opp, dev_opp);
         if (ret)