X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Fchar%2Fmbcs.c;h=acd8e9ed474ae74e6b53fd58539ec3efaf5f2b26;hb=a7ef6a40f700496c60b8f7206fff74fecd67b3a2;hp=f4716ad7348ae7185bdba2a35379b9a68fd37a63;hpb=6585b4a71f523485ecf33e7f4569be4095d63699;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c
index f4716ad7348..acd8e9ed474 100644
--- a/drivers/char/mbcs.c
+++ b/drivers/char/mbcs.c
@@ -24,6 +24,7 @@
 #include <linux/mm.h>
 #include <linux/uio.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -382,15 +383,19 @@ static int mbcs_open(struct inode *ip, struct file *fp)
 	struct mbcs_soft *soft;
 	int minor;
 
+	lock_kernel();
 	minor = iminor(ip);
 
+	/* Nothing protects access to this list... */
 	list_for_each_entry(soft, &soft_list, list) {
 		if (soft->nasid == minor) {
 			fp->private_data = soft->cxdev;
+			unlock_kernel();
 			return 0;
 		}
 	}
 
+	unlock_kernel();
 	return -ENODEV;
 }