From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 20 May 2008 17:16:52 +0000 (+0200)
Subject: uctrl: BKL pushdown
X-Git-Tag: firefly_0821_release~19698^2~23
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f138e4814a9c28bc44d967a8effdd977ac00fc6e;p=firefly-linux-kernel-4.4.55.git

uctrl: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---

diff --git a/drivers/sbus/char/uctrl.c b/drivers/sbus/char/uctrl.c
index 383f32c1d347..513ba61ae966 100644
--- a/drivers/sbus/char/uctrl.c
+++ b/drivers/sbus/char/uctrl.c
@@ -9,6 +9,7 @@
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/ioport.h>
 #include <linux/init.h>
 #include <linux/miscdevice.h>
@@ -211,8 +212,10 @@ uctrl_ioctl(struct inode *inode, struct file *file,
 static int
 uctrl_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	uctrl_get_event_status();
 	uctrl_get_external_status();
+	unlock_kernel();
 	return 0;
 }