From: Jonas Gorski Date: Thu, 10 Sep 2015 10:09:42 +0000 (+0000) Subject: ipq806x: fix uninitialized variable usage in cpufreq-krait X-Git-Tag: reboot~2091 X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fopenwrt.git;a=commitdiff_plain;h=82fb27917b9cf62f3c9f0ad1bc7db0e83c5eccbc ipq806x: fix uninitialized variable usage in cpufreq-krait In krait_cpufreq_probe, both freq and max_cpu_freq are never initialized, so the max_cpu_freq will have a random value at the end. Fix this by properly initializing max_cpu_freq to 0 and storing the clk frequency in freq as well, to make it similar to how it's calculated in krait_set_target. Fixes the following warnings: In file included from include/linux/clk.h:16:0, from drivers/cpufreq/cpufreq-krait.c:13: drivers/cpufreq/cpufreq-krait.c: In function 'krait_cpufreq_probe': include/linux/kernel.h:714:24: warning: 'freq' may be used uninitialized in this function [-Wmaybe-uninitialized] _max1 > _max2 ? _max1 : _max2; }) ^ drivers/cpufreq/cpufreq-krait.c:217:25: note: 'freq' was declared here unsigned long freq_Hz, freq, max_cpu_freq; ^ In file included from include/linux/clk.h:16:0, from drivers/cpufreq/cpufreq-krait.c:13: include/linux/kernel.h:714:24: warning: 'max_cpu_freq' may be used uninitialized in this function [-Wmaybe-uninitialized] _max1 > _max2 ? _max1 : _max2; }) ^ drivers/cpufreq/cpufreq-krait.c:217:31: note: 'max_cpu_freq' was declared here unsigned long freq_Hz, freq, max_cpu_freq; Signed-off-by: Jonas Gorski SVN-Revision: 46839 --- diff --git a/target/linux/ipq806x/patches-3.18/145-cpufreq-Add-a-cpufreq-krait-based-on-cpufre.patch b/target/linux/ipq806x/patches-3.18/145-cpufreq-Add-a-cpufreq-krait-based-on-cpufre.patch index 15cabf3eb9..6052b417ac 100644 --- a/target/linux/ipq806x/patches-3.18/145-cpufreq-Add-a-cpufreq-krait-based-on-cpufre.patch +++ b/target/linux/ipq806x/patches-3.18/145-cpufreq-Add-a-cpufreq-krait-based-on-cpufre.patch @@ -270,7 +270,7 @@ Signed-off-by: Stephen Boyd + struct device *dev; + struct clk *clk; + struct regulator *core; -+ unsigned long freq_Hz, freq, max_cpu_freq; ++ unsigned long freq_Hz, freq, max_cpu_freq = 0; + struct dev_pm_opp *opp; + unsigned long volt, tol; + @@ -341,7 +341,7 @@ Signed-off-by: Stephen Boyd + } + per_cpu(krait_supply_core, cpu) = core; + -+ freq_Hz = clk_get_rate(clk); ++ freq = freq_Hz = clk_get_rate(clk); + + rcu_read_lock(); + opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_Hz); diff --git a/target/linux/ipq806x/patches-4.1/145-cpufreq-Add-a-cpufreq-krait-based-on-cpufre.patch b/target/linux/ipq806x/patches-4.1/145-cpufreq-Add-a-cpufreq-krait-based-on-cpufre.patch index 521adc5c1e..84f856bbf6 100644 --- a/target/linux/ipq806x/patches-4.1/145-cpufreq-Add-a-cpufreq-krait-based-on-cpufre.patch +++ b/target/linux/ipq806x/patches-4.1/145-cpufreq-Add-a-cpufreq-krait-based-on-cpufre.patch @@ -270,7 +270,7 @@ Signed-off-by: Stephen Boyd + struct device *dev; + struct clk *clk; + struct regulator *core; -+ unsigned long freq_Hz, freq, max_cpu_freq; ++ unsigned long freq_Hz, freq, max_cpu_freq = 0; + struct dev_pm_opp *opp; + unsigned long volt, tol; + @@ -341,7 +341,7 @@ Signed-off-by: Stephen Boyd + } + per_cpu(krait_supply_core, cpu) = core; + -+ freq_Hz = clk_get_rate(clk); ++ freq = freq_Hz = clk_get_rate(clk); + + rcu_read_lock(); + opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_Hz);