---

yaml --- r: 100335 b: refs/heads/master c: 556889a h: refs/heads/master i: 100333: 41d7680 100331: f799810 100327: 8312038 100319: ecf9cbe v: v3
git-mirror · Jun 20, 2008 · 66fd87d · 66fd87d
1 parent f345cae
commit 66fd87d
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Showing 2 changed files with 8 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8324af6dddac11f9f7e9df8b784f6949ddb61b5d
+refs/heads/master: 556889a4ae89d5f2adf98cac58ecf9326b0d0297
diff --git a/trunk/drivers/char/briq_panel.c b/trunk/drivers/char/briq_panel.c
@@ -6,6 +6,7 @@
 
 #include <linux/module.h>
 
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/tty.h>
@@ -67,11 +68,15 @@ static void set_led(char state)
 
 static int briq_panel_open(struct inode *ino, struct file *filep)
 {
-	/* enforce single access */
-	if (vfd_is_open)
+	lock_kernel();
+	/* enforce single access, vfd_is_open is protected by BKL */
+	if (vfd_is_open) {
+		unlock_kernel();
 		return -EBUSY;
+	}
 	vfd_is_open = 1;
 
+	unlock_kernel();
 	return 0;
 }