From 0404bd629fd4d05e7ab815e6e1ecd81e728678d3 Mon Sep 17 00:00:00 2001 From: Bernard Metzler Date: Mon, 9 Sep 2019 15:24:27 +0200 Subject: [PATCH] RDMA/siw: Fix page address mapping in TX path Use the correct kmap()/kunmap() flow to determine page address used for CRC computation. Using page_address() is wrong, since page might be in highmem. Fixes: b9be6f18cf9e ("rdma/siw: transmit path") Link: https://lore.kernel.org/r/20190909132427.30264-1-bmt@zurich.ibm.com Reported-by: Krishnamraju Eraparaju Signed-off-by: Bernard Metzler Reviewed-by: Jason Gunthorpe Signed-off-by: Jason Gunthorpe --- drivers/infiniband/sw/siw/siw_qp_tx.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c b/drivers/infiniband/sw/siw/siw_qp_tx.c index 43020d2..eb83fe1 100644 --- a/drivers/infiniband/sw/siw/siw_qp_tx.c +++ b/drivers/infiniband/sw/siw/siw_qp_tx.c @@ -520,11 +520,12 @@ static int siw_tx_hdt(struct siw_iwarp_tx *c_tx, struct socket *s) c_tx->mpa_crc_hd, iov[seg].iov_base, plen); - } else if (do_crc) - crypto_shash_update( - c_tx->mpa_crc_hd, - page_address(p) + fp_off, - plen); + } else if (do_crc) { + crypto_shash_update(c_tx->mpa_crc_hd, + kmap(p) + fp_off, + plen); + kunmap(p); + } } else { u64 pa = ((sge->laddr + sge_off) & PAGE_MASK); -- 2.7.4