[PATCH 1/5] NFSD: Fix off-by-one in DRC bucket pruning limit

[Chuck Lever <cel@kernel.org>]

nfsd_prune_bucket_locked() evicts an entry before checking
the freed count against @max. The check uses "++freed > max",
which does not break until freed exceeds max, resulting in
max + 1 evictions. Use ">=" so the limit stated in the
function comment is honored.

Fixes: a9507f6af145 ("NFSD: Replace nfsd_prune_bucket()")
Signed-off-by: Chuck Lever <cel@kernel.org>
---
 fs/nfsd/nfscache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 07a53a5b3d37..c7db532c8523 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -277,7 +277,7 @@ nfsd_prune_bucket_locked(struct nfsd_net *nn, struct nfsd_drc_bucket *b,
 		nfsd_cacherep_unlink_locked(nn, b, rp);
 		list_add(&rp->c_lru, dispose);
 
-		if (max && ++freed > max)
+		if (max && ++freed >= max)
 			break;
 	}
 }
-- 
2.54.0