Fix afs_release() to go through the cleanup part of the function if
FMODE_WRITE is set rather than exiting through vfs_fsync() (which skips the
cleanup).  The cleanup involves discarding the refs on the key used for
file ops and the writeback key record.

Also fix afs_evict_inode() to clean up any left over wb keys attached to
the inode/vnode when it is removed.

Fixes: 5a8132761609 ("afs: Do better accretion of small writes on newly created 
content")
Signed-off-by: David Howells <dhowe...@redhat.com>
---

 fs/afs/file.c  |    7 ++++---
 fs/afs/inode.c |    1 +
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/fs/afs/file.c b/fs/afs/file.c
index e8d6619890a9..eee2b5663b92 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -170,11 +170,12 @@ int afs_release(struct inode *inode, struct file *file)
 {
        struct afs_vnode *vnode = AFS_FS_I(inode);
        struct afs_file *af = file->private_data;
+       int ret;
 
        _enter("{%llx:%llu},", vnode->fid.vid, vnode->fid.vnode);
 
        if ((file->f_mode & FMODE_WRITE))
-               return vfs_fsync(file, 0);
+               ret = vfs_fsync(file, 0);
 
        file->private_data = NULL;
        if (af->wb)
@@ -182,8 +183,8 @@ int afs_release(struct inode *inode, struct file *file)
        key_put(af->key);
        kfree(af);
        afs_prune_wb_keys(vnode);
-       _leave(" = 0");
-       return 0;
+       _leave(" = %d", ret);
+       return ret;
 }
 
 /*
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index c4652b42d545..f30aa5eacd39 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -573,6 +573,7 @@ void afs_evict_inode(struct inode *inode)
        }
 #endif
 
+       afs_prune_wb_keys(vnode);
        afs_put_permits(rcu_access_pointer(vnode->permit_cache));
        key_put(vnode->silly_key);
        vnode->silly_key = NULL;

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