From 2ef907b80d1cc289a4352287bbb9fc5a19eed212 Mon Sep 17 00:00:00 2001 From: Dean Luick Date: Wed, 3 Feb 2016 14:36:22 -0800 Subject: [PATCH] staging/rdma/hfi1: Fix snoop packet length calculation The LRH has a 12 bit packet length field, not 11 bit. This caused a snoop packet length miscalculation leading to a crash when sending a large ping over IPoIB while running opapacketcapture. Reviewed-by: Mike Marciniszyn Signed-off-by: Dean Luick Signed-off-by: Jubin John Signed-off-by: Doug Ledford --- drivers/staging/rdma/hfi1/diag.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/staging/rdma/hfi1/diag.c b/drivers/staging/rdma/hfi1/diag.c index d9889d430698..fafb3d7f8367 100644 --- a/drivers/staging/rdma/hfi1/diag.c +++ b/drivers/staging/rdma/hfi1/diag.c @@ -5,7 +5,7 @@ * * GPL LICENSE SUMMARY * - * Copyright(c) 2015 Intel Corporation. + * Copyright(c) 2015, 2016 Intel Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as @@ -18,7 +18,7 @@ * * BSD LICENSE * - * Copyright(c) 2015 Intel Corporation. + * Copyright(c) 2015, 2016 Intel Corporation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -85,10 +85,9 @@ static u8 snoop_flags; /* * Extract packet length from LRH header. - * Why & 0x7FF? Because len is only 11 bits in case it wasn't 0'd we throw the - * bogus bits away. This is in Dwords so multiply by 4 to get size in bytes + * This is in Dwords so multiply by 4 to get size in bytes */ -#define HFI1_GET_PKT_LEN(x) (((be16_to_cpu((x)->lrh[2]) & 0x7FF)) << 2) +#define HFI1_GET_PKT_LEN(x) (((be16_to_cpu((x)->lrh[2]) & 0xFFF)) << 2) enum hfi1_filter_status { HFI1_FILTER_HIT, -- 2.20.1