[PATCH] ANDROID: fix err_cast.cocci warnings

[kbuild test robot <lkp@intel.com>]

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From: kbuild test robot <lkp@intel.com>

fs/incfs/integrity.c:138:9-16: WARNING: ERR_CAST can be used with hash_alg


 Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(...))

Generated by: scripts/coccinelle/api/err_cast.cocci

Fixes: 040942fc50b2 ("ANDROID: Initial commit of Incremental FS")
CC: Eugene Zemtsov <ezemtsov@google.com>
Signed-off-by: kbuild test robot <lkp@intel.com>
---

tree:   https://android.googlesource.com/kernel/common android-4.19
head:   7bab03039e64ed6c26be90530e08978eab3be578
commit: 040942fc50b20325bb56737c32b303268bb6f35c [1/4] ANDROID: Initial commit of Incremental FS

 integrity.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/incfs/integrity.c
+++ b/fs/incfs/integrity.c
@@ -135,7 +135,7 @@ struct mtree *incfs_alloc_mtree(enum inc
 
 	hash_alg = incfs_get_hash_alg(id);
 	if (IS_ERR(hash_alg))
-		return ERR_PTR(PTR_ERR(hash_alg));
+		return ERR_CAST(hash_alg);
 
 	if (root_hash.len < hash_alg->digest_size)
 		return ERR_PTR(-EINVAL);