Use IS_ERR to validate return value from get_mtd_device()

Testing has shown that is needed.

diff --git a/yaffs_vfs_multi.c b/yaffs_vfs_multi.c
index 27cc0c010d73b7ce6d934ad948fe6dae66eef21a..f7673155348774a3120f911d5ca1d02ad75153a1 100644 (file)
--- a/yaffs_vfs_multi.c
+++ b/yaffs_vfs_multi.c
@@ -2670,7 +2670,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 
        /* Get the device */
        mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
-       if (!mtd) {
+       if (IS_ERR(mtd)) {
                yaffs_trace(YAFFS_TRACE_ALWAYS,
                        "yaffs: MTD device %u either not valid or unavailable",
                        MINOR(sb->s_dev));