drivers: Push down BKL into various drivers

These are the last remaining device drivers using
the ->ioctl file operation in the drivers directory
(except from v4l drivers).

[fweisbec: drop i8k pushdown as it has been done from
procfs pushdown branch already]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
diff --git a/drivers/char/nwflash.c b/drivers/char/nwflash.c
index f808109..043a1c7 100644
--- a/drivers/char/nwflash.c
+++ b/drivers/char/nwflash.c
@@ -94,8 +94,9 @@
 	return c2;
 }
 
-static int flash_ioctl(struct inode *inodep, struct file *filep, unsigned int cmd, unsigned long arg)
+static long flash_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
 {
+	lock_kernel();
 	switch (cmd) {
 	case CMD_WRITE_DISABLE:
 		gbWriteBase64Enable = 0;
@@ -113,8 +114,10 @@
 	default:
 		gbWriteBase64Enable = 0;
 		gbWriteEnable = 0;
+		unlock_kernel();
 		return -EINVAL;
 	}
+	unlock_kernel();
 	return 0;
 }
 
@@ -631,7 +634,7 @@
 	.llseek		= flash_llseek,
 	.read		= flash_read,
 	.write		= flash_write,
-	.ioctl		= flash_ioctl,
+	.unlocked_ioctl	= flash_ioctl,
 };
 
 static struct miscdevice flash_miscdev =