From: Moshe Lazer Date: Wed, 23 Oct 2013 06:53:17 +0000 (+0300) Subject: IB/mlx5: Fix srq free in destroy qp X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cfd8f1d49b61b20aab77d5af5ec907dc99bb0064;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git IB/mlx5: Fix srq free in destroy qp On destroy QP the driver walks over the relevant CQ and removes CQEs reported for the destroyed QP. It also frees the related SRQ entry without checking that this is actually an SRQ-related CQE. In case of a CQ used for both send and receive QP, we could free SRQ entries for send CQEs. This patch resolves this issue by verifying that this is a SRQ related CQE by checking the SRQ number in the CQE is not zero. Signed-off-by: Moshe Lazer Signed-off-by: Eli Cohen Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c index e7c64c57d699..84591865e39d 100644 --- a/drivers/infiniband/hw/mlx5/cq.c +++ b/drivers/infiniband/hw/mlx5/cq.c @@ -750,17 +750,9 @@ int mlx5_ib_destroy_cq(struct ib_cq *cq) return 0; } -static int is_equal_rsn(struct mlx5_cqe64 *cqe64, struct mlx5_ib_srq *srq, - u32 rsn) +static int is_equal_rsn(struct mlx5_cqe64 *cqe64, u32 rsn) { - u32 lrsn; - - if (srq) - lrsn = be32_to_cpu(cqe64->srqn) & 0xffffff; - else - lrsn = be32_to_cpu(cqe64->sop_drop_qpn) & 0xffffff; - - return rsn == lrsn; + return rsn == (ntohl(cqe64->sop_drop_qpn) & 0xffffff); } void __mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 rsn, struct mlx5_ib_srq *srq) @@ -790,8 +782,8 @@ void __mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 rsn, struct mlx5_ib_srq *srq) while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) { cqe = get_cqe(cq, prod_index & cq->ibcq.cqe); cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; - if (is_equal_rsn(cqe64, srq, rsn)) { - if (srq) + if (is_equal_rsn(cqe64, rsn)) { + if (srq && (ntohl(cqe64->srqn) & 0xffffff)) mlx5_ib_free_srq_wqe(srq, be16_to_cpu(cqe64->wqe_counter)); ++nfreed; } else if (nfreed) {