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IB/srp: Fix possible send queue overflow 

When using work request based memory registration (fast_reg)
we must reserve SQ entries for registration and invalidation
in addition to send operations. Each IO consumes 3 SQ entries
(registration, send, invalidation) so we need to allocate 3x
larger send-queue instead of 2x.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
CC: Stable <stable@vger.kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Sagi Grimberg 2015-12-01 10:18:03 -08:00 committed by Doug Ledford
parent 4d59ad2995
commit 09c0c0bea5
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/ulp/srp/ib_srp.c
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@ -488,7 +488,7 @@ static int srp_create_ch_ib(struct srp_rdma_ch *ch)
struct ib_qp *qp;
struct ib_fmr_pool *fmr_pool = NULL;
struct srp_fr_pool *fr_pool = NULL;
const int m = 1 + dev->use_fast_reg;
const int m = dev->use_fast_reg ? 3 : 1;
struct ib_cq_init_attr cq_attr = {};
int ret;