Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubi-2.6

1 files changed, 22 insertions, 9 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index f5061fe..d2f3318 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/compatmac.h>
@@ -25,10 +26,13 @@ static void mtd_notify_add(struct mtd_info* mtd)
 	if (!mtd)
 		return;
 
-	device_create(mtd_class, NULL, MKDEV(MTD_CHAR_MAJOR, mtd->index*2), "mtd%d", mtd->index);
+	device_create_drvdata(mtd_class, NULL,
+			      MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
+			      NULL, "mtd%d", mtd->index);
 
-	device_create(mtd_class, NULL,
-		      MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1), "mtd%dro", mtd->index);
+	device_create_drvdata(mtd_class, NULL,
+			      MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1),
+			      NULL, "mtd%dro", mtd->index);
 }
 
 static void mtd_notify_remove(struct mtd_info* mtd)
@@ -84,6 +88,7 @@ static int mtd_open(struct inode *inode, struct file *file)
 {
 	int minor = iminor(inode);
 	int devnum = minor >> 1;
+	int ret = 0;
 	struct mtd_info *mtd;
 	struct mtd_file_info *mfi;
 
@@ -96,31 +101,39 @@ static int mtd_open(struct inode *inode, struct file *file)
 	if ((file->f_mode & 2) && (minor & 1))
 		return -EACCES;
 
+	lock_kernel();
 	mtd = get_mtd_device(NULL, devnum);
 
-	if (IS_ERR(mtd))
-		return PTR_ERR(mtd);
+	if (IS_ERR(mtd)) {
+		ret = PTR_ERR(mtd);
+		goto out;
+	}
 
 	if (MTD_ABSENT == mtd->type) {
 		put_mtd_device(mtd);
-		return -ENODEV;
+		ret = -ENODEV;
+		goto out;
 	}
 
 	/* You can't open it RW if it's not a writeable device */
 	if ((file->f_mode & 2) && !(mtd->flags & MTD_WRITEABLE)) {
 		put_mtd_device(mtd);
-		return -EACCES;
+		ret = -EACCES;
+		goto out;
 	}
 
 	mfi = kzalloc(sizeof(*mfi), GFP_KERNEL);
 	if (!mfi) {
 		put_mtd_device(mtd);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto out;
 	}
 	mfi->mtd = mtd;
 	file->private_data = mfi;
 
-	return 0;
+out:
+	unlock_kernel();
+	return ret;
 } /* mtd_open */
 
 /*====================================================================*/