ecryptfs: fixed testing of file descriptor flags

This patch replaces the check (lower_file->f_flags & O_RDONLY) with
((lower_file & O_ACCMODE) == O_RDONLY).

Signed-off-by: Roberto Sassu <roberto.sassu@polito.it>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 99259f850e58..e069e786da43 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -199,8 +199,8 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
                         ecryptfs_dentry->d_name.name, rc);
                 goto out_free;
         }
-        if ((ecryptfs_inode_to_private(inode)->lower_file->f_flags & O_RDONLY)
-            && !(file->f_flags & O_RDONLY)) {
+        if ((ecryptfs_inode_to_private(inode)->lower_file->f_flags & O_ACCMODE)
+            == O_RDONLY && (file->f_flags & O_ACCMODE) != O_RDONLY) {
                 rc = -EPERM;
                 printk(KERN_WARNING "%s: Lower persistent file is RO; eCryptfs "
                        "file must hence be opened RO\n", __func__);