Merge tag 'nfsd-4.3-1' of git://linux-nfs.org/~bfields/linux

Pull nfsd bugfix from Bruce Fields:
 "Just one RDMA bugfix"

* tag 'nfsd-4.3-1' of git://linux-nfs.org/~bfields/linux:
  svcrdma: handle rdma read with a non-zero initial page offset

diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index cb51742840740f790d24797e585e7fb520646a09..5f6ca47092b039a1c927420a51b851a83047b5fc 100644 (file)
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -136,7 +136,8 @@ int rdma_read_chunk_lcl(struct svcxprt_rdma *xprt,
        ctxt->direction = DMA_FROM_DEVICE;
        ctxt->read_hdr = head;
        pages_needed = min_t(int, pages_needed, xprt->sc_max_sge_rd);
-       read = min_t(int, pages_needed << PAGE_SHIFT, rs_length);
+       read = min_t(int, (pages_needed << PAGE_SHIFT) - *page_offset,
+                    rs_length);
 
        for (pno = 0; pno < pages_needed; pno++) {
                int len = min_t(int, rs_length, PAGE_SIZE - pg_off);
@@ -235,7 +236,8 @@ 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);
-       read = min_t(int, pages_needed << PAGE_SHIFT, rs_length);
+       read = min_t(int, (pages_needed << PAGE_SHIFT) - *page_offset,
+                    rs_length);
 
        frmr->kva = page_address(rqstp->rq_arg.pages[pg_no]);
        frmr->direction = DMA_FROM_DEVICE;