The cpuidle_register_driver return value is not checked.
The init function returns always -EIO when cpuidle_register_device
fails but the error could be different.
This patch fixes that by checking the cpuidle_register_driver properly
and returning the correct value when cpuidle_register_device fails.
Signed-off-by: Daniel Lezcano <daniel.lezc...@linaro.org>
---
arch/arm/mach-exynos/cpuidle.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/arch/arm/mach-exynos/cpuidle.c b/arch/arm/mach-exynos/cpuidle.c
index f8dd1cd..a5fe194 100644
--- a/arch/arm/mach-exynos/cpuidle.c
+++ b/arch/arm/mach-exynos/cpuidle.c
@@ -193,13 +193,17 @@ static void __init exynos5_core_down_clk(void)
static int __init exynos4_init_cpuidle(void)
{
- int cpu_id;
+ int cpu_id, ret;
struct cpuidle_device *device;
if (soc_is_exynos5250())
exynos5_core_down_clk();
- cpuidle_register_driver(&exynos4_idle_driver);
+ ret = cpuidle_register_driver(&exynos4_idle_driver);
+ if (ret) {
+ printk(KERN_ERR "CPUidle failed to register driver\n");
+ return ret;
+ }
for_each_cpu(cpu_id, cpu_online_mask) {
device = &per_cpu(exynos4_cpuidle_device, cpu_id);
@@ -209,9 +213,10 @@ static int __init exynos4_init_cpuidle(void)
if (cpu_id != 0)
device->state_count = 1;
- if (cpuidle_register_device(device)) {
- printk(KERN_ERR "CPUidle register device failed\n,");
- return -EIO;
+ ret = cpuidle_register_device(device);
+ if (ret) {
+ printk(KERN_ERR "CPUidle register device failed\n");
+ return ret;
}
}
--
1.7.9.5
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