4 files changed, 12 insertions, 2 deletions
diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c
index a3059b3168fd..9a0d32e4b422 100644
--- a/fs/netfs/buffered_write.c
+++ b/fs/netfs/buffered_write.c
@@ -477,6 +477,9 @@ ssize_t netfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 
 	_enter("%llx,%zx,%llx", iocb->ki_pos, iov_iter_count(from), i_size_read(inode));
 
+	if (!iov_iter_count(from))
+		return 0;
+
 	if ((iocb->ki_flags & IOCB_DIRECT) ||
 	    test_bit(NETFS_ICTX_UNBUFFERED, &ictx->flags))
 		return netfs_unbuffered_write_iter(iocb, from);
diff --git a/fs/netfs/direct_write.c b/fs/netfs/direct_write.c
index 60a40d293c87..bee047e20f5d 100644
--- a/fs/netfs/direct_write.c
+++ b/fs/netfs/direct_write.c
@@ -139,6 +139,9 @@ ssize_t netfs_unbuffered_write_iter(struct kiocb *iocb, struct iov_iter *from)
 
 	_enter("%llx,%zx,%llx", iocb->ki_pos, iov_iter_count(from), i_size_read(inode));
 
+	if (!iov_iter_count(from))
+		return 0;
+
 	trace_netfs_write_iter(iocb, from);
 	netfs_stat(&netfs_n_rh_dio_write);
 
@@ -146,7 +149,7 @@ ssize_t netfs_unbuffered_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	if (ret < 0)
 		return ret;
 	ret = generic_write_checks(iocb, from);
-	if (ret < 0)
+	if (ret <= 0)
 		goto out;
 	ret = file_remove_privs(file);
 	if (ret < 0)
diff --git a/fs/netfs/fscache_io.c b/fs/netfs/fscache_io.c
index ad572f7ee897..43a651ed8264 100644
--- a/fs/netfs/fscache_io.c
+++ b/fs/netfs/fscache_io.c
@@ -83,8 +83,10 @@ static int fscache_begin_operation(struct netfs_cache_resources *cres,
 	cres->debug_id		= cookie->debug_id;
 	cres->inval_counter	= cookie->inval_counter;
 
-	if (!fscache_begin_cookie_access(cookie, why))
+	if (!fscache_begin_cookie_access(cookie, why)) {
+		cres->cache_priv = NULL;
 		return -ENOBUFS;
+	}
 
 again:
 	spin_lock(&cookie->lock);
diff --git a/fs/netfs/io.c b/fs/netfs/io.c
index e8ff1e61ce79..4261ad6c55b6 100644
--- a/fs/netfs/io.c
+++ b/fs/netfs/io.c
@@ -748,6 +748,8 @@ int netfs_begin_read(struct netfs_io_request *rreq, bool sync)
 
 	if (!rreq->submitted) {
 		netfs_put_request(rreq, false, netfs_rreq_trace_put_no_submit);
+		if (rreq->origin == NETFS_DIO_READ)
+			inode_dio_end(rreq->inode);
 		ret = 0;
 		goto out;
 	}