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-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_rw.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_rw.c b/net/sunrpc/xprtrdma/svc_rdma_rw.c
index 9bd04549a1ad..12b9a7e0b6d2 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_rw.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_rw.c
@@ -727,12 +727,16 @@ static int svc_rdma_build_normal_read_chunk(struct svc_rqst *rqstp,
head->arg.head[0].iov_len - info->ri_position;
head->arg.head[0].iov_len = info->ri_position;
- /* Read chunk may need XDR roundup (see RFC 5666, s. 3.7).
+ /* Read chunk may need XDR roundup (see RFC 8166, s. 3.4.5.2).
*
- * NFSv2/3 write decoders need the length of the tail to
- * contain the size of the roundup padding.
+ * If the client already rounded up the chunk length, the
+ * length does not change. Otherwise, the length of the page
+ * list is increased to include XDR round-up.
+ *
+ * Currently these chunks always start at page offset 0,
+ * thus the rounded-up length never crosses a page boundary.
*/
- head->arg.tail[0].iov_len += 4 - (info->ri_chunklen & 3);
+ info->ri_chunklen = XDR_QUADLEN(info->ri_chunklen) << 2;
head->arg.page_len = info->ri_chunklen;
head->arg.len += info->ri_chunklen;