fs/hfsplus/extents.c: fix concurrent acess of alloc_blocks

[cascardo/linux.git] / fs / dcache.c

diff --git a/fs/dcache.c b/fs/dcache.c
index 265e0ce..ca02c13 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2833,9 +2833,9 @@ static int prepend_name(char **buffer, int *buflen, struct qstr *name)
        u32 dlen = ACCESS_ONCE(name->len);
        char *p;
 
-       if (*buflen < dlen + 1)
-               return -ENAMETOOLONG;
        *buflen -= dlen + 1;
+       if (*buflen < 0)
+               return -ENAMETOOLONG;
        p = *buffer -= dlen + 1;
        *p++ = '/';
        while (dlen--) {