[RFC PATCH 11/11] Partially revert "hw/block/nvme: drain namespaces on sq deletion"

[Klaus Jensen <its@irrelevant.dk>]

From: Klaus Jensen <k.jensen@samsung.com>

This partially reverts commit 98f84f5a4eca5c03e32fff20f246d9b4b96d6422.

Since all "multi aio" commands are now reimplemented to properly track
the nested aiocbs, we can revert the "hack" that was introduced to make
sure all requests we're properly drained upon sq deletion.

The revert is partial since we keep the assert that no outstanding
requests remain on the submission queue after the explicit cancellation.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/nvme/ctrl.c | 19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)

diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index ee77abd19661..d25c5d8187e9 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -3886,7 +3886,6 @@ static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeRequest *req)
     NvmeSQueue *sq;
     NvmeCQueue *cq;
     uint16_t qid = le16_to_cpu(c->qid);
-    uint32_t nsid;
 
     if (unlikely(!qid || nvme_check_sqid(n, qid))) {
         trace_pci_nvme_err_invalid_del_sq(qid);
@@ -3898,22 +3897,8 @@ static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeRequest *req)
     sq = n->sq[qid];
     while (!QTAILQ_EMPTY(&sq->out_req_list)) {
         r = QTAILQ_FIRST(&sq->out_req_list);
-        if (r->aiocb) {
-            blk_aio_cancel(r->aiocb);
-        }
-    }
-
-    /*
-     * Drain all namespaces if there are still outstanding requests that we
-     * could not cancel explicitly.
-     */
-    if (!QTAILQ_EMPTY(&sq->out_req_list)) {
-        for (nsid = 1; nsid <= NVME_MAX_NAMESPACES; nsid++) {
-            NvmeNamespace *ns = nvme_ns(n, nsid);
-            if (ns) {
-                nvme_ns_drain(ns);
-            }
-        }
+        assert(r->aiocb);
+        blk_aio_cancel(r->aiocb);
     }
 
     assert(QTAILQ_EMPTY(&sq->out_req_list));
-- 
2.31.1