From: Santosh Shilimkar <santosh.shilimkar@ti.com>
Date: Mon, 25 Mar 2013 10:05:05 +0000 (+0530)
Subject: ARM: OMAP: CPUidle: Unregister drivere on device registration failure
X-Git-Tag: firefly_0821_release~3680^2~504^2~5^2~27^2~3
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=63b951ed5b82c2891982437d1f57cb94dc0b3757;p=firefly-linux-kernel-4.4.55.git

ARM: OMAP: CPUidle: Unregister drivere on device registration failure

If the CPUidle device registration fails for some reason, we should
unregister the driver on error path.

Fix the code accordingly. Also when at it, check of the driver registration
failure too.

Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
---

diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 4f67a5b9bc52..a300122caddd 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -359,7 +359,10 @@ int __init omap3_idle_init(void)
 	if (!mpu_pd || !core_pd || !per_pd || !cam_pd)
 		return -ENODEV;
 
-	cpuidle_register_driver(&omap3_idle_driver);
+	if (cpuidle_register_driver(&omap3_idle_driver)) {
+		pr_err("%s: CPUidle driver register failed\n", __func__);
+		return -EIO;
+	}
 
 	dev = &per_cpu(omap3_idle_dev, smp_processor_id());
 	dev->cpu = 0;
@@ -367,6 +370,7 @@ int __init omap3_idle_init(void)
 	if (cpuidle_register_device(dev)) {
 		printk(KERN_ERR "%s: CPUidle register device failed\n",
 		       __func__);
+		cpuidle_unregister_driver(&omap3_idle_driver);
 		return -EIO;
 	}
 
diff --git a/arch/arm/mach-omap2/cpuidle44xx.c b/arch/arm/mach-omap2/cpuidle44xx.c
index 72c5407fdd12..aeeb8e61406e 100644
--- a/arch/arm/mach-omap2/cpuidle44xx.c
+++ b/arch/arm/mach-omap2/cpuidle44xx.c
@@ -222,7 +222,10 @@ int __init omap4_idle_init(void)
 	if (!cpu_clkdm[0] || !cpu_clkdm[1])
 		return -ENODEV;
 
-	cpuidle_register_driver(&omap4_idle_driver);
+	if (cpuidle_register_driver(&omap4_idle_driver)) {
+		pr_err("%s: CPUidle driver register failed\n", __func__);
+		return -EIO;
+	}
 
 	for_each_cpu(cpu_id, cpu_online_mask) {
 		dev = &per_cpu(omap4_idle_dev, cpu_id);
@@ -232,6 +235,7 @@ int __init omap4_idle_init(void)
 #endif
 		if (cpuidle_register_device(dev)) {
 			pr_err("%s: CPUidle register failed\n", __func__);
+			cpuidle_unregister_driver(&omap4_idle_driver);
 			return -EIO;
 		}
 	}