AoE: cdev lock_kernel() pushdown

Signed-off-by: Jonathan Corbet <corbet@lwn.net>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/block/aoe/aoechr.c b/drivers/block/aoe/aoechr.c
index e8e60e7a2e70..d1de68a31920 100644
--- a/drivers/block/aoe/aoechr.c
+++ b/drivers/block/aoe/aoechr.c
@@ -7,6 +7,7 @@
 #include <linux/hdreg.h>
 #include <linux/blkdev.h>
 #include <linux/delay.h>
+#include <linux/smp_lock.h>
 #include "aoe.h"
 
 enum {
@@ -174,12 +175,16 @@ aoechr_open(struct inode *inode, struct file *filp)
 {
         int n, i;
 
+        lock_kernel();
         n = iminor(inode);
         filp->private_data = (void *) (unsigned long) n;
 
         for (i = 0; i < ARRAY_SIZE(chardevs); ++i)
-                if (chardevs[i].minor == n)
+                if (chardevs[i].minor == n) {
+                        unlock_kernel();
                         return 0;
+                }
+        unlock_kernel();
         return -EINVAL;
 }