hw/block/nvme: replace dma_acct with blk_acct equivalent

The QSG isn't always initialized, so accounting could be wrong. Issue a
call to blk_acct_start instead with the size taken from the QSG or IOV
depending on the kind of I/O.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 3a9e25eb0ec50ec1693609b0e2e5d64f93b86450..81f26fecad26956d2e74a1a476e9750a4ab25453 100644 (file)
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -637,9 +637,10 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
         return NVME_INVALID_FIELD | NVME_DNR;
     }
 
-    dma_acct_start(n->conf.blk, &req->acct, &req->qsg, acct);
     if (req->qsg.nsg > 0) {
         req->has_sg = true;
+        block_acct_start(blk_get_stats(n->conf.blk), &req->acct, req->qsg.size,
+                         acct);
         req->aiocb = is_write ?
             dma_blk_write(n->conf.blk, &req->qsg, data_offset, BDRV_SECTOR_SIZE,
                           nvme_rw_cb, req) :
@@ -647,6 +648,8 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
                          nvme_rw_cb, req);
     } else {
         req->has_sg = false;
+        block_acct_start(blk_get_stats(n->conf.blk), &req->acct, req->iov.size,
+                         acct);
         req->aiocb = is_write ?
             blk_aio_pwritev(n->conf.blk, data_offset, &req->iov, 0, nvme_rw_cb,
                             req) :