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authorMichael J. Ruhl <michael.j.ruhl@intel.com>2019-06-28 21:22:04 +0300
committerJason Gunthorpe <jgg@mellanox.com>2019-06-29 04:34:26 +0300
commitd310c4bf8aeacc0256091feb6a0337b8fef763ac (patch)
treea9dd155f469d37fc696e2ebf8a1570a2dc30f582 /include/rdma/rdma_vt.h
parentfe2ac04712cdc6e93d32e9c82c73bfb225554309 (diff)
downloadlinux-d310c4bf8aeacc0256091feb6a0337b8fef763ac.tar.xz
IB/{rdmavt, hfi1, qib}: Remove AH refcount for UD QPs
Historically rdmavt destroy_ah() has returned an -EBUSY when the AH has a non-zero reference count. IBTA 11.2.2 notes no such return value or error case: Output Modifiers: - Verb results: - Operation completed successfully. - Invalid HCA handle. - Invalid address handle. ULPs never test for this error and this will leak memory. The reference count exists to allow for driver independent progress mechanisms to process UD SWQEs in parallel with post sends. The SWQE will hold a reference count until the UD SWQE completes and then drops the reference. Fix by removing need to reference count the AH. Add a UD specific allocation to each SWQE entry to cache the necessary information for independent progress. Copy the information during the post send processing. Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'include/rdma/rdma_vt.h')
-rw-r--r--include/rdma/rdma_vt.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/include/rdma/rdma_vt.h b/include/rdma/rdma_vt.h
index 997f42678806..525848e227dc 100644
--- a/include/rdma/rdma_vt.h
+++ b/include/rdma/rdma_vt.h
@@ -2,7 +2,7 @@
#define DEF_RDMA_VT_H
/*
- * Copyright(c) 2016 - 2018 Intel Corporation.
+ * Copyright(c) 2016 - 2019 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.
@@ -202,7 +202,6 @@ struct rvt_pd {
struct rvt_ah {
struct ib_ah ibah;
struct rdma_ah_attr attr;
- atomic_t refcount;
u8 vl;
u8 log_pmtu;
};