Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw

[pandora-kernel.git] / arch / x86 / kernel / cpuid.c

diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index 3fa4e92..6a44d64 100644 (file)
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -88,6 +88,8 @@ static ssize_t cpuid_read(struct file *file, char __user *buf,
        struct cpuid_regs cmd;
        int cpu = iminor(file->f_path.dentry->d_inode);
        u64 pos = *ppos;
+       ssize_t bytes = 0;
+       int err = 0;
 
        if (count % 16)
                return -EINVAL; /* Invalid chunk size */
@@ -95,14 +97,19 @@ static ssize_t cpuid_read(struct file *file, char __user *buf,
        for (; count; count -= 16) {
                cmd.eax = pos;
                cmd.ecx = pos >> 32;
-               smp_call_function_single(cpu, cpuid_smp_cpuid, &cmd, 1);
-               if (copy_to_user(tmp, &cmd, 16))
-                       return -EFAULT;
+               err = smp_call_function_single(cpu, cpuid_smp_cpuid, &cmd, 1);
+               if (err)
+                       break;
+               if (copy_to_user(tmp, &cmd, 16)) {
+                       err = -EFAULT;
+                       break;
+               }
                tmp += 16;
+               bytes += 16;
                *ppos = ++pos;
        }
 
-       return tmp - buf;
+       return bytes ? bytes : err;
 }
 
 static int cpuid_open(struct inode *inode, struct file *file)