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Commit 09c0c0be authored by Sagi Grimberg's avatar Sagi Grimberg Committed by Doug Ledford
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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: default avatarSagi Grimberg <sagig@mellanox.com>
CC: Stable <stable@vger.kernel.org>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 4d59ad29

drivers/infiniband/ulp/srp/ib_srp.c

+1 −1
Original line number Diff line number Diff line
@@ -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;