From mboxrd@z Thu Jan 1 00:00:00 1970 From: sagi@grimberg.me (Sagi Grimberg) Date: Wed, 11 Oct 2017 15:29:09 +0300 Subject: [PATCH 4/7] nvme-rdma: Check that reinit_request got a proper mr In-Reply-To: <1507724952-13917-1-git-send-email-sagi@grimberg.me> References: <1507724952-13917-1-git-send-email-sagi@grimberg.me> Message-ID: <1507724952-13917-5-git-send-email-sagi@grimberg.me> Warn if req->mr is NULL as it should never happen. Signed-off-by: Sagi Grimberg --- drivers/nvme/host/rdma.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 6e62657662fd..93f4dd0b6f26 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -274,6 +274,9 @@ static int nvme_rdma_reinit_request(void *data, struct request *rq) struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq); int ret = 0; + if (WARN_ON_ONCE(!req->mr)) + return 0; + ib_dereg_mr(req->mr); req->mr = ib_alloc_mr(dev->pd, IB_MR_TYPE_MEM_REG, -- 2.7.4