cifs: have cifsFileInfo hold a reference to a tlink rather than tcon pointer

cifsFileInfo needs a pointer to a tcon, but it doesn't currently hold a
reference to it. Change it to keep a pointer to a tcon_link instead and
hold a reference to it.

That will keep the tcon from being freed until the file is closed.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index cc70a61a47d2..077bf756f342 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -38,7 +38,7 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
         struct cifs_sb_info *cifs_sb;
 #ifdef CONFIG_CIFS_POSIX
         struct cifsFileInfo *pSMBFile = filep->private_data;
-        struct cifsTconInfo *tcon = pSMBFile->tcon;
+        struct cifsTconInfo *tcon = tlink_tcon(pSMBFile->tlink);
         __u64   ExtAttrBits = 0;
         __u64   ExtAttrMask = 0;
         __u64   caps = le64_to_cpu(tcon->fsUnixInfo.Capability);