[PATCH 04/16] hw/block/nvme: remove redundant has_sg member

[Klaus Jensen <its@irrelevant.dk>]

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

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

Also, make sure the request iov is destroyed at completion time.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
---
 hw/block/nvme.c | 11 ++++++-----
 hw/block/nvme.h |  1 -
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index cb236d1c8c46..6a1a1626b87b 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -548,16 +548,20 @@ 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);
@@ -583,7 +587,6 @@ 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,
@@ -621,7 +624,6 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
     }
 
     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 ?
@@ -630,7 +632,6 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
             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 ?
diff --git a/hw/block/nvme.h b/hw/block/nvme.h
index 0b6a8ae66559..5519b5cc7686 100644
--- a/hw/block/nvme.h
+++ b/hw/block/nvme.h
@@ -22,7 +22,6 @@ typedef struct NvmeRequest {
     struct NvmeSQueue       *sq;
     BlockAIOCB              *aiocb;
     uint16_t                status;
-    bool                    has_sg;
     NvmeCqe                 cqe;
     BlockAcctCookie         acct;
     QEMUSGList              qsg;
-- 
2.27.0