PM / OPP: Fix static checker warning (broken 64bit big endian systems)
authorViresh Kumar <viresh.kumar@linaro.org>
Mon, 17 Aug 2015 13:50:20 +0000 (19:20 +0530)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Fri, 28 Aug 2015 13:43:24 +0000 (15:43 +0200)
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>
drivers/base/power/opp.c

index 4d6c457..803d8b7 100644 (file)
@@ -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)