From: Ashish Samant <ashish.samant@oracle.com>
Date: Fri, 25 Mar 2016 17:53:41 +0000 (-0700)
Subject: fuse: Fix return value from fuse_get_user_pages()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2c932d4c9165ddbe417af612dbe2113df7f2057e;p=linux-beck.git

fuse: Fix return value from fuse_get_user_pages()

fuse_get_user_pages() should return error or 0. Otherwise fuse_direct_io
read will not return 0 to indicate that read has completed.

Fixes: 742f992708df ("fuse: return patrial success from fuse_direct_io()")
Signed-off-by: Ashish Samant <ashish.samant@oracle.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 719924d6c706..dcad5e210525 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1295,7 +1295,7 @@ static int fuse_get_user_pages(struct fuse_req *req, struct iov_iter *ii,
 
 	*nbytesp = nbytes;
 
-	return ret;
+	return ret < 0 ? ret : 0;
 }
 
 static inline int fuse_iter_npages(const struct iov_iter *ii_p)