linux-kernel - [PATCH 2/2] virtiofs, dax: Fixed smatch warning about ret being uninitialized

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Message-Id: <20210506184304.321645-3-vgoyal@redhat.com>
Date:   Thu,  6 May 2021 14:43:04 -0400
From:   Vivek Goyal <vgoyal@...hat.com>
To:     linux-fsdevel@...r.kernel.org, virtio-fs@...hat.com,
        miklos@...redi.hu
Cc:     vgoyal@...hat.com, dgilbert@...hat.com,
        linux-kernel@...r.kernel.org, dan.carpenter@...cle.com
Subject: [PATCH 2/2] virtiofs, dax: Fixed smatch warning about ret being uninitialized

Dan reported a smatch warning about "ret" being uninitialized. Fix it.

fs/fuse/dax.c:197 dmap_removemapping_list() error: uninitialized symbol 'ret'.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Vivek Goyal <vgoyal@...hat.com>
---
 fs/fuse/dax.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c
index f06fdad3f7b1..1608b6606ef0 100644
--- a/fs/fuse/dax.c
+++ b/fs/fuse/dax.c
@@ -253,7 +253,10 @@ static int dmap_removemapping_list(struct inode *inode, unsigned int num,
 	struct fuse_removemapping_one *remove_one, *ptr;
 	struct fuse_removemapping_in inarg;
 	struct fuse_dax_mapping *dmap;
-	int ret, i = 0, nr_alloc;
+	int ret = 0, i = 0, nr_alloc;
+
+	if (!num)
+		return ret;
 
 	nr_alloc = min_t(unsigned int, num, FUSE_REMOVEMAPPING_MAX_ENTRY);
 	remove_one = kmalloc_array(nr_alloc, sizeof(*remove_one), GFP_NOFS);
-- 
2.25.4