[PATCH AUTOSEL 5.9 113/147] nfsd4: remove check_conflicting_opens warning

Sasha Levin
2020-10-26T23:51:49Z

From: "J. Bruce Fields" <bfields@redhat.com>

[ Upstream commit 50747dd5e47bde3b7d7f839c84d0d3b554090497 ]

There are actually rare races where this is possible (e.g. if a new open
intervenes between the read of i_writecount and the fi_fds).

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/nfsd/nfs4state.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 0525acfe31314..1f646a27481fb 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4954,7 +4954,6 @@ static int nfsd4_check_conflicting_opens(struct nfs4_client *clp,
writes--;
if (fp->fi_fds[O_RDWR])
writes--;
- WARN_ON_ONCE(writes < 0);
if (writes > 0)
return -EAGAIN;
spin_lock(&fp->fi_lock);
--
2.25.1