[MTD] Fix error checking after get_mtd_device() in get_sb_mtd functions

It returns ERR_PTR(foo) on error, not just NULL.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c
index a279540ba87a..aca331971201 100644
--- a/drivers/mtd/mtdsuper.c
+++ b/drivers/mtd/mtdsuper.c
@@ -106,9 +106,9 @@ static int get_sb_mtd_nr(struct file_system_type *fs_type, int flags,
         struct mtd_info *mtd;
 
         mtd = get_mtd_device(NULL, mtdnr);
-        if (!mtd) {
+        if (IS_ERR(mtd)) {
                 DEBUG(0, "MTDSB: Device #%u doesn't appear to exist\n", mtdnr);
-                return -EINVAL;
+                return PTR_ERR(mtd);
         }
 
         return get_sb_mtd_aux(fs_type, flags, dev_name, data, mtd, fill_super,
@@ -145,7 +145,7 @@ int get_sb_mtd(struct file_system_type *fs_type, int flags,
 
                         for (mtdnr = 0; mtdnr < MAX_MTD_DEVICES; mtdnr++) {
                                 mtd = get_mtd_device(NULL, mtdnr);
-                                if (mtd) {
+                                if (!IS_ERR(mtd)) {
                                         if (!strcmp(mtd->name, dev_name + 4))
                                                 return get_sb_mtd_aux(
                                                         fs_type, flags,