diff options
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/arm_big_little_dt.c | 43 |
1 files changed, 29 insertions, 14 deletions
diff --git a/drivers/cpufreq/arm_big_little_dt.c b/drivers/cpufreq/arm_big_little_dt.c index 452ff46f20b7..44be3115375c 100644 --- a/drivers/cpufreq/arm_big_little_dt.c +++ b/drivers/cpufreq/arm_big_little_dt.c @@ -31,22 +31,28 @@ static int dt_init_opp_table(struct device *cpu_dev) { - struct device_node *np = NULL; + struct device_node *np, *parent; int count = 0, ret; - for_each_child_of_node(of_find_node_by_path("/cpus"), np) { + parent = of_find_node_by_path("/cpus"); + if (!parent) { + pr_err("failed to find OF /cpus\n"); + return -ENOENT; + } + + for_each_child_of_node(parent, np) { if (count++ != cpu_dev->id) continue; - if (!of_get_property(np, "operating-points", NULL)) - return -ENODATA; - - cpu_dev->of_node = np; - - ret = of_init_opp_table(cpu_dev); - if (ret) - return ret; - - return 0; + if (!of_get_property(np, "operating-points", NULL)) { + ret = -ENODATA; + } else { + cpu_dev->of_node = np; + ret = of_init_opp_table(cpu_dev); + } + of_node_put(np); + of_node_put(parent); + + return ret; } return -ENODEV; @@ -54,15 +60,24 @@ static int dt_init_opp_table(struct device *cpu_dev) static int dt_get_transition_latency(struct device *cpu_dev) { - struct device_node *np = NULL; + struct device_node *np, *parent; u32 transition_latency = CPUFREQ_ETERNAL; int count = 0; - for_each_child_of_node(of_find_node_by_path("/cpus"), np) { + parent = of_find_node_by_path("/cpus"); + if (!parent) { + pr_err("failed to find OF /cpus\n"); + return -ENOENT; + } + + for_each_child_of_node(parent, np) { if (count++ != cpu_dev->id) continue; of_property_read_u32(np, "clock-latency", &transition_latency); + of_node_put(np); + of_node_put(parent); + return 0; } |