From: Mike Marciniszyn Date: Wed, 27 Jun 2012 22:33:05 +0000 (-0400) Subject: IB/qib: Fix UC MR refs for immediate operations X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=354dff1bd8ccd41b6e8421226d586d35e7fb8920;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git IB/qib: Fix UC MR refs for immediate operations An MR reference leak exists when handling UC RDMA writes with immediate data because we manipulate the reference counts as if the operation had been a send. This patch moves the last_imm label so that the RDMA write operations with immediate data converge at the cq building code. The copy/mr deref code is now done correctly prior to the branch to last_imm. Reviewed-by: Edward Mascarenhas Signed-off-by: Mike Marciniszyn Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/hw/qib/qib_uc.c b/drivers/infiniband/hw/qib/qib_uc.c index ce7387ff5d91..70b4cb710f9a 100644 --- a/drivers/infiniband/hw/qib/qib_uc.c +++ b/drivers/infiniband/hw/qib/qib_uc.c @@ -403,7 +403,6 @@ send_last: if (unlikely(wc.byte_len > qp->r_len)) goto rewind; wc.opcode = IB_WC_RECV; -last_imm: qib_copy_sge(&qp->r_sge, data, tlen, 0); while (qp->s_rdma_read_sge.num_sge) { atomic_dec(&qp->s_rdma_read_sge.sge.mr->refcount); @@ -411,6 +410,7 @@ last_imm: qp->s_rdma_read_sge.sge = *qp->s_rdma_read_sge.sg_list++; } +last_imm: wc.wr_id = qp->r_wr_id; wc.status = IB_WC_SUCCESS; wc.qp = &qp->ibqp; @@ -509,6 +509,12 @@ rdma_last_imm: } wc.byte_len = qp->r_len; wc.opcode = IB_WC_RECV_RDMA_WITH_IMM; + qib_copy_sge(&qp->r_sge, data, tlen, 1); + while (qp->r_sge.num_sge) { + atomic_dec(&qp->r_sge.sge.mr->refcount); + if (--qp->r_sge.num_sge) + qp->r_sge.sge = *qp->r_sge.sg_list++; + } goto last_imm; case OP(RDMA_WRITE_LAST):