[PATCH v6 24/42] nvme: remove redundant has_sg member

[Klaus Jensen]

From: Klaus Jensen <address@hidden>

Remove the has_sg member from NvmeRequest since it's redundant.

Signed-off-by: Klaus Jensen <address@hidden>
---
 hw/block/nvme.c | 18 ++++++++++++------
 hw/block/nvme.h |  1 -
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 187c816eb6ad..e40c080c3b48 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -484,16 +484,20 @@ static void nvme_rw_cb(void *opaque, int ret)
         block_acct_failed(blk_get_stats(n->conf.blk), &req->acct);
         req->status = NVME_INTERNAL_DEV_ERROR;
     }
-    if (req->has_sg) {
+
+    if (req->qsg.nalloc) {
         qemu_sglist_destroy(&req->qsg);
     }
+    if (req->iov.nalloc) {
+        qemu_iovec_destroy(&req->iov);
+    }
+
     nvme_enqueue_req_completion(cq, req);
 }
 
 static uint16_t nvme_flush(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
     NvmeRequest *req)
 {
-    req->has_sg = false;
     block_acct_start(blk_get_stats(n->conf.blk), &req->acct, 0,
          BLOCK_ACCT_FLUSH);
     req->aiocb = blk_aio_flush(n->conf.blk, nvme_rw_cb, req);
@@ -517,7 +521,6 @@ static uint16_t nvme_write_zeros(NvmeCtrl *n, NvmeNamespace 
*ns, NvmeCmd *cmd,
         return NVME_LBA_RANGE | NVME_DNR;
     }
 
-    req->has_sg = false;
     block_acct_start(blk_get_stats(n->conf.blk), &req->acct, 0,
                      BLOCK_ACCT_WRITE);
     req->aiocb = blk_aio_pwrite_zeroes(n->conf.blk, offset, count,
@@ -554,16 +557,19 @@ 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) :
             dma_blk_read(n->conf.blk, &req->qsg, data_offset, BDRV_SECTOR_SIZE,
                          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) :
diff --git a/hw/block/nvme.h b/hw/block/nvme.h
index b4d1738a3d0a..442b17bf1701 100644
--- a/hw/block/nvme.h
+++ b/hw/block/nvme.h
@@ -29,7 +29,6 @@ typedef struct NvmeRequest {
     struct NvmeSQueue       *sq;
     BlockAIOCB              *aiocb;
     uint16_t                status;
-    bool                    has_sg;
     NvmeCqe                 cqe;
     BlockAcctCookie         acct;
     QEMUSGList              qsg;
-- 
2.25.1