From: Michael J. Ruhl <michael.j.ruhl@xxxxxxxxx> If a MAD packet has incorrect header information, the logic uses the reply path to report the error. The reply path expects *resp_len to be set prior to return. Unfortunately, *resp_len is set to 0 for this path. This causes an incorrect response packet. Fix by ensuring that the *resp_len is defaulted to the incoming packet size (wc->bytes_len - sizeof(GRH)). Reviewed-by: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx> Signed-off-by: Michael J. Ruhl <michael.j.ruhl@xxxxxxxxx> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx> --- drivers/infiniband/hw/hfi1/mad.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/hfi1/mad.c b/drivers/infiniband/hw/hfi1/mad.c index 0307405..88a0cf9 100644 --- a/drivers/infiniband/hw/hfi1/mad.c +++ b/drivers/infiniband/hw/hfi1/mad.c @@ -1,5 +1,5 @@ /* - * Copyright(c) 2015-2017 Intel Corporation. + * Copyright(c) 2015-2018 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. @@ -4836,7 +4836,7 @@ static int hfi1_process_opa_mad(struct ib_device *ibdev, int mad_flags, int ret; int pkey_idx; int local_mad = 0; - u32 resp_len = 0; + u32 resp_len = in_wc->byte_len - sizeof(*in_grh); struct hfi1_ibport *ibp = to_iport(ibdev, port); pkey_idx = hfi1_lookup_pkey_idx(ibp, LIM_MGMT_P_KEY);
