[PATCH] cifs: wait for tcon resource_id before getting fscache super

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The logic for initializing tcon->resource_id is done inside
cifs_root_iget. fscache super cookie relies on this for aux
data. So we need to push the fscache initialization to this
later point during mount.

Signed-off-by: Shyam Prasad N <sprasad@xxxxxxxxxxxxx>
---
 fs/cifs/connect.c | 6 ------
 fs/cifs/fscache.c | 2 +-
 fs/cifs/inode.c   | 7 +++++++
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 6b705026da1a3..eee994b0925ff 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3046,12 +3046,6 @@ static int mount_get_conns(struct mount_ctx *mnt_ctx)
  cifs_dbg(VFS, "read only mount of RW share\n");
  /* no need to log a RW mount of a typical RW share */
  }
- /*
- * The cookie is initialized from volume info returned above.
- * Inside cifs_fscache_get_super_cookie it checks
- * that we do not get super cookie twice.
- */
- cifs_fscache_get_super_cookie(tcon);
  }

  /*
diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c
index 7e409a38a2d7c..f4da693760c11 100644
--- a/fs/cifs/fscache.c
+++ b/fs/cifs/fscache.c
@@ -92,7 +92,7 @@ void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon)
  * In the future, as we integrate with newer fscache features,
  * we may want to instead add a check if cookie has changed
  */
- if (tcon->fscache == NULL)
+ if (tcon->fscache)
  return;

  sharename = extract_sharename(tcon->treeName);
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 82848412ad852..96d083db17372 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1376,6 +1376,13 @@ struct inode *cifs_root_iget(struct super_block *sb)
  inode = ERR_PTR(rc);
  }

+ /*
+ * The cookie is initialized from volume info returned above.
+ * Inside cifs_fscache_get_super_cookie it checks
+ * that we do not get super cookie twice.
+ */
+ cifs_fscache_get_super_cookie(tcon);
+
 out:
  kfree(path);
  free_xid(xid);



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