1 files changed, 28 insertions, 12 deletions

diff --git a/arch/sparc/kernel/apc.c b/arch/sparc/kernel/apc.c
index 54f7ccd7455f..5267d48fb2c6 100644
--- a/arch/sparc/kernel/apc.c
+++ b/arch/sparc/kernel/apc.c
@@ -85,54 +85,70 @@ static int apc_release(struct inode *inode, struct file *f)
         return 0;
 }
 
-static int apc_ioctl(struct inode *inode, struct file *f, 
-                     unsigned int cmd, unsigned long __arg)
+static long apc_ioctl(struct file *f, unsigned int cmd, unsigned long __arg)
 {
         __u8 inarg, __user *arg;
 
         arg = (__u8 __user *) __arg;
+
+        lock_kernel();
+
         switch (cmd) {
         case APCIOCGFANCTL:
-                if (put_user(apc_readb(APC_FANCTL_REG) & APC_REGMASK, arg))
-                                return -EFAULT;
+                if (put_user(apc_readb(APC_FANCTL_REG) & APC_REGMASK, arg)) {
+                        unlock_kernel();
+                        return -EFAULT;
+                }
                 break;
 
         case APCIOCGCPWR:
-                if (put_user(apc_readb(APC_CPOWER_REG) & APC_REGMASK, arg))
+                if (put_user(apc_readb(APC_CPOWER_REG) & APC_REGMASK, arg)) {
+                        unlock_kernel();
                         return -EFAULT;
+                }
                 break;
 
         case APCIOCGBPORT:
-                if (put_user(apc_readb(APC_BPORT_REG) & APC_BPMASK, arg))
+                if (put_user(apc_readb(APC_BPORT_REG) & APC_BPMASK, arg)) {
+                        unlock_kernel();
                         return -EFAULT;
+                }
                 break;
 
         case APCIOCSFANCTL:
-                if (get_user(inarg, arg))
+                if (get_user(inarg, arg)) {
+                        unlock_kernel();
                         return -EFAULT;
+                }
                 apc_writeb(inarg & APC_REGMASK, APC_FANCTL_REG);
                 break;
         case APCIOCSCPWR:
-                if (get_user(inarg, arg))
+                if (get_user(inarg, arg)) {
+                        unlock_kernel();
                         return -EFAULT;
+                }
                 apc_writeb(inarg & APC_REGMASK, APC_CPOWER_REG);
                 break;
         case APCIOCSBPORT:
-                if (get_user(inarg, arg))
+                if (get_user(inarg, arg)) {
+                        unlock_kernel();
                         return -EFAULT;
+                }
                 apc_writeb(inarg & APC_BPMASK, APC_BPORT_REG);
                 break;
         default:
+                unlock_kernel();
                 return -EINVAL;
         };
 
+        unlock_kernel();
         return 0;
 }
 
 static const struct file_operations apc_fops = {
-        .ioctl =        apc_ioctl,
-        .open =         apc_open,
-        .release =      apc_release,
+        .unlocked_ioctl =       apc_ioctl,
+        .open =                 apc_open,
+        .release =              apc_release,
 };
 
 static struct miscdevice apc_miscdev = { APC_MINOR, APC_DEVNAME, &apc_fops };