nvme-rdma: remove I/O polling support

The code was always a bit of a hack that digs far too much into
RDMA core internals.  Lets kick it out and reimplement proper
dedicated poll queues as needed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 3ca096c..75c01d2 100644 (file)
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1738,29 +1738,6 @@ err:
        return BLK_STS_IOERR;
 }
 
-static int nvme_rdma_poll(struct blk_mq_hw_ctx *hctx)
-{
-       struct nvme_rdma_queue *queue = hctx->driver_data;
-       struct ib_cq *cq = queue->ib_cq;
-       struct ib_wc wc;
-       int found = 0;
-
-       while (ib_poll_cq(cq, 1, &wc) > 0) {
-               struct ib_cqe *cqe = wc.wr_cqe;
-
-               if (cqe) {
-                       if (cqe->done == nvme_rdma_recv_done) {
-                               nvme_rdma_recv_done(cq, &wc);
-                               found++;
-                       } else {
-                               cqe->done(cq, &wc);
-                       }
-               }
-       }
-
-       return found;
-}
-
 static void nvme_rdma_complete_rq(struct request *rq)
 {
        struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
@@ -1782,7 +1759,6 @@ static const struct blk_mq_ops nvme_rdma_mq_ops = {
        .init_request   = nvme_rdma_init_request,
        .exit_request   = nvme_rdma_exit_request,
        .init_hctx      = nvme_rdma_init_hctx,
-       .poll           = nvme_rdma_poll,
        .timeout        = nvme_rdma_timeout,
        .map_queues     = nvme_rdma_map_queues,
 };