[PATCH RFC] svcrdma: Fix possible over population fast_reg_page_list

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When accounting the needed_pages, we need to look into
the page_list->max_page_list_len and not the global
context xprt->sc_frmr_pg_list_len.

Signed-off-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
---
 net/sunrpc/xprtrdma/svc_rdma_recvfrom.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index 2e1348b..b19ffd3 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -244,7 +244,8 @@ int rdma_read_chunk_frmr(struct svcxprt_rdma *xprt,
 
 	ctxt->direction = DMA_FROM_DEVICE;
 	ctxt->frmr = frmr;
-	pages_needed = min_t(int, pages_needed, xprt->sc_frmr_pg_list_len);
+	pages_needed = min_t(int, pages_needed,
+			     frmr->page_list->max_page_list_len);
 	read = min_t(int, pages_needed << PAGE_SHIFT, rs_length);
 
 	frmr->kva = page_address(rqstp->rq_arg.pages[pg_no]);
-- 
1.7.1

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