X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=fs%2Fchar_dev.c;h=3cb7cda3d780e95026142398f4c52cdf565d93b6;hb=6eaaaac97433575894570a990aa27310040a8177;hp=038674aa88a72c09a88388ee7cf1b54839675052;hpb=4f02f8220562591322c118d07a32bebf705318b7;p=karo-tx-linux.git

diff --git a/fs/char_dev.c b/fs/char_dev.c
index 038674aa88a7..3cb7cda3d780 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -55,7 +55,6 @@ static struct char_device_struct {
 	unsigned int baseminor;
 	int minorct;
 	char name[64];
-	struct file_operations *fops;
 	struct cdev *cdev;		/* will die */
 } *chrdevs[CHRDEV_MAJOR_HASH_SIZE];
 
@@ -374,6 +373,8 @@ static int chrdev_open(struct inode *inode, struct file *filp)
 			return -ENXIO;
 		new = container_of(kobj, struct cdev, kobj);
 		spin_lock(&cdev_lock);
+		/* Check i_cdev again in case somebody beat us to it while
+		   we dropped the lock. */
 		p = inode->i_cdev;
 		if (!p) {
 			inode->i_cdev = p = new;
@@ -393,11 +394,8 @@ static int chrdev_open(struct inode *inode, struct file *filp)
 		cdev_put(p);
 		return -ENXIO;
 	}
-	if (filp->f_op->open) {
-		lock_kernel();
+	if (filp->f_op->open)
 		ret = filp->f_op->open(inode,filp);
-		unlock_kernel();
-	}
 	if (ret)
 		cdev_put(p);
 	return ret;