[PATCH] sunrpc/cache: skip checking the pending cache expired

[Kinglong Mee <kinglongmee@gmail.com>]

When the first time pynfs runs after rpc/nfsd startup, always get the warning, 

Got error: Connection closed

Commit 778620364ef5 "sunrpc/cache: make cache flushing more reliable." lets
cache_is_expired() checking expired as, 

return (h->expiry_time < seconds_since_boot()) ||
        (detail->flush_time >= h->last_refresh);

The detail->flush_time is equal to h->last_refresh time, when the cache is
new created and then do the upcall immediately. So that, the cache will be
treated as expired and be cleaned when write_flush().

This patch skips checking the pending cache expired when doing upcall.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
---
 include/linux/sunrpc/cache.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 62a60ee..9961c1f 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -204,8 +204,11 @@ static inline void cache_put(struct cache_head *h, struct cache_detail *cd)
 	kref_put(&h->ref, cd->cache_put);
 }
 
-static inline int cache_is_expired(struct cache_detail *detail, struct cache_head *h)
+static inline bool cache_is_expired(struct cache_detail *detail, struct cache_head *h)
 {
+	if (test_bit(CACHE_PENDING, &h->flags))
+		return false;
+
 	return  (h->expiry_time < seconds_since_boot()) ||
 		(detail->flush_time >= h->last_refresh);
 }
-- 
2.9.3