fs: ubifs: Need to check return for being an error pointer

The return value from alloc_super can be an error pointer so the error
check needs to detect this as well as checking the pointer for being
NULL.

This issue was found by Smatch.

Signed-off-by: Andrew Goodbody <andrew.goodbody@linaro.org>

diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 7718081..b6004b8 100644 (file)
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2425,7 +2425,7 @@ retry:
        if (!s) {
                spin_unlock(&sb_lock);
                s = alloc_super(type, flags);
-               if (!s)
+               if (IS_ERR_OR_NULL(s))
                        return ERR_PTR(-ENOMEM);
 #ifndef __UBOOT__
                goto retry;