Re: [PATCH v2 04/16] hw/block/nvme: remove redundant has_sg member

[Maxim Levitsky]

On Thu, 2020-07-30 at 00:06 +0200, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> Remove the has_sg member from NvmeRequest since it's redundant.
> 
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>


Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>

Best regards,
        Maxim Levitsky

> ---
>  hw/block/nvme.c | 7 ++-----
>  hw/block/nvme.h | 1 -
>  2 files changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index d60b19e1840f..a9d9a2912655 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -550,7 +550,8 @@ 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);
>      }
>      nvme_enqueue_req_completion(cq, req);
> @@ -559,7 +560,6 @@ static void nvme_rw_cb(void *opaque, int ret)
>  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);
> @@ -585,7 +585,6 @@ 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,
> @@ -623,7 +622,6 @@ 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 ?
> @@ -632,7 +630,6 @@ 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;