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nfsd: simplify put of fi_deleg_file

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fi_delegees is basically just a reference count on users of
fi_deleg_file, which is cleared when fi_delegees goes to zero.  The
fi_deleg_file check here is redundant.  Also add an assertion to make
sure we don't have unbalanced puts.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
This commit is contained in:
J. Bruce Fields 2018-02-15 15:29:15 -05:00
parent 6f29d07ca4
commit b8232d3315
1 changed files with 4 additions and 1 deletions
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5
fs/nfsd/nfs4state.c
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@ -879,9 +879,12 @@ static void nfs4_put_deleg_lease(struct nfs4_file *fp)
{
struct file *filp = NULL;
WARN_ON_ONCE(!fp->fi_delegees);
spin_lock(&fp->fi_lock);
if (fp->fi_deleg_file && --fp->fi_delegees == 0)
if (--fp->fi_delegees == 0) {
swap(filp, fp->fi_deleg_file);
}
spin_unlock(&fp->fi_lock);
if (filp) {