aboutsummaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/msr.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/msr.c')
-rw-r--r--arch/x86/kernel/msr.c16
1 files changed, 6 insertions, 10 deletions
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index 6a3cefc7dda1..553449951b84 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -174,21 +174,17 @@ static int msr_open(struct inode *inode, struct file *file)
174{ 174{
175 unsigned int cpu = iminor(file->f_path.dentry->d_inode); 175 unsigned int cpu = iminor(file->f_path.dentry->d_inode);
176 struct cpuinfo_x86 *c = &cpu_data(cpu); 176 struct cpuinfo_x86 *c = &cpu_data(cpu);
177 int ret = 0;
178 177
179 lock_kernel();
180 cpu = iminor(file->f_path.dentry->d_inode); 178 cpu = iminor(file->f_path.dentry->d_inode);
181 179
182 if (cpu >= nr_cpu_ids || !cpu_online(cpu)) { 180 if (cpu >= nr_cpu_ids || !cpu_online(cpu))
183 ret = -ENXIO; /* No such CPU */ 181 return -ENXIO; /* No such CPU */
184 goto out; 182
185 }
186 c = &cpu_data(cpu); 183 c = &cpu_data(cpu);
187 if (!cpu_has(c, X86_FEATURE_MSR)) 184 if (!cpu_has(c, X86_FEATURE_MSR))
188 ret = -EIO; /* MSR not supported */ 185 return -EIO; /* MSR not supported */
189out: 186
190 unlock_kernel(); 187 return 0;
191 return ret;
192} 188}
193 189
194/* 190/*