X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=arch%2Fx86%2Fkernel%2Fmsr.c;h=a153b3905f60591cb6fb627cad9dcc6e529e25cb;hp=4dfb4053005714bb222f19d821856ccb19cadd7a;hb=e89e896d31b11a51a54ddcd3f72a76bd286dd86c;hpb=e1c25dc638db01600069b3f9167d1b35f8d574b5

diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index 4dfb40530057..a153b3905f60 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -117,12 +117,20 @@ static int msr_open(struct inode *inode, struct file *file)
 {
 	unsigned int cpu = iminor(file->f_path.dentry->d_inode);
 	struct cpuinfo_x86 *c = &cpu_data(cpu);
+	int ret = 0;
 
-	if (cpu >= NR_CPUS || !cpu_online(cpu))
-		return -ENXIO;	/* No such CPU */
-	if (!cpu_has(c, X86_FEATURE_MSR))
-		return -EIO;	/* MSR not supported */
+	lock_kernel();
+	cpu = iminor(file->f_path.dentry->d_inode);
 
+	if (cpu >= NR_CPUS || !cpu_online(cpu)) {
+		ret = -ENXIO;	/* No such CPU */
+		goto out;
+	}
+	c = &cpu_data(cpu);
+	if (!cpu_has(c, X86_FEATURE_MSR))
+		ret = -EIO;	/* MSR not supported */
+out:
+	unlock_kernel();
 	return 0;
 }
 
@@ -162,12 +170,10 @@ static int __cpuinit msr_class_cpu_callback(struct notifier_block *nfb,
 		err = msr_device_create(cpu);
 		break;
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 	case CPU_DEAD:
 		msr_device_destroy(cpu);
 		break;
-	case CPU_UP_CANCELED_FROZEN:
-		destroy_suspended_device(msr_class, MKDEV(MSR_MAJOR, cpu));
-		break;
 	}
 	return err ? NOTIFY_BAD : NOTIFY_OK;
 }