X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fchar%2Fmbcs.c;h=acd8e9ed474ae74e6b53fd58539ec3efaf5f2b26;hb=c5b0079c0a7641caac3fedab75e8e63aeb54d7e2;hp=f4716ad7348ae7185bdba2a35379b9a68fd37a63;hpb=5b39dba5029108800b94a5f4f96e3a05417103ac;p=linux-2.6

diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c
index f4716ad734..acd8e9ed47 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;
 }