[PATCH 11/19] nfsd: fix FL_SLEEP being set unconditionally for all LOCK types

[Jeff Layton]

The FL_SLEEP guard uses lk_type & (NFS4_READW_LT | NFS4_WRITEW_LT) which
computes lk_type & 7, non-zero for all valid lock types including
non-blocking ones. This was introduced by commit 7e64c5bc497c
("NLM/NFSD: Fix lock notifications for async-capable filesystems") when
refactoring from per-case switch arms.

Replace the bitmask test with explicit equality checks.

Fixes: 7e64c5bc497c ("NLM/NFSD: Fix lock notifications for async-capable filesystems")
Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/nfsd/nfs4state.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 19aab4c52548..8c714001c116 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -8589,10 +8589,11 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		goto out;
 	}
 
-	if (lock->lk_type & (NFS4_READW_LT | NFS4_WRITEW_LT) &&
-		nfsd4_has_session(cstate) &&
-		locks_can_async_lock(nf->nf_file->f_op))
-			flags |= FL_SLEEP;
+	if ((lock->lk_type == NFS4_READW_LT ||
+	     lock->lk_type == NFS4_WRITEW_LT) &&
+	    nfsd4_has_session(cstate) &&
+	    locks_can_async_lock(nf->nf_file->f_op))
+		flags |= FL_SLEEP;
 
 	nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn);
 	if (!nbl) {

-- 
2.54.0