From 0fc176dfdafc78e66bd74f54e487ca1fc59d01bf Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Wed, 11 Oct 2017 15:29:09 +0300 Subject: [PATCH] nvme-rdma: Check that reinit_request got a proper mr Warn if req->mr is NULL as it should never happen. Reviewed-by: Johannes Thumshirn Signed-off-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- 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 221ace23aaa5..7e61e6447d2c 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, -- GitLab