Re: [PATCH v2 10/18] hw/block/nvme: fix missing endian conversion

[Klaus Jensen]

On Jul  3 10:34, Philippe Mathieu-Daudé wrote:
> On 7/3/20 8:34 AM, Klaus Jensen wrote:
> > From: Klaus Jensen <k.jensen@samsung.com>
> > 
> > Fix a missing cpu_to conversion.
> > 
> > Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> > Reviewed-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
> > ---
> >  hw/block/nvme.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> > index f3a5b857bc92..ba523f6768bf 100644
> > --- a/hw/block/nvme.c
> > +++ b/hw/block/nvme.c
> > @@ -1080,7 +1080,7 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd 
> > *cmd, NvmeRequest *req)
> >  
> >          break;
> >      case NVME_VOLATILE_WRITE_CACHE:
> > -        result = blk_enable_write_cache(n->conf.blk);
> > +        result = cpu_to_le32(blk_enable_write_cache(n->conf.blk));
> >          trace_pci_nvme_getfeat_vwcache(result ? "enabled" : "disabled");
> >          break;
> >      case NVME_NUMBER_OF_QUEUES:
> > 
> 
> This doesn't look correct. What you probably want:
> 
> -- >8 --
> 
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -815,8 +815,8 @@ static uint16_t nvme_get_feature(NvmeCtrl *n,
> NvmeCmd *cmd, NvmeRequest *req)
>          trace_pci_nvme_getfeat_vwcache(result ? "enabled" : "disabled");
>          break;
>      case NVME_NUMBER_OF_QUEUES:
> -        result = cpu_to_le32((n->params.max_ioqpairs - 1) |
> -                             ((n->params.max_ioqpairs - 1) << 16));
> +        result = (n->params.max_ioqpairs - 1)
> +                  | ((n->params.max_ioqpairs - 1) << 16);
>          trace_pci_nvme_getfeat_numq(result);
>          break;
>      case NVME_TIMESTAMP:
> @@ -825,8 +825,8 @@ static uint16_t nvme_get_feature(NvmeCtrl *n,
> NvmeCmd *cmd, NvmeRequest *req)
>          trace_pci_nvme_err_invalid_getfeat(dw10);
>          return NVME_INVALID_FIELD | NVME_DNR;
>      }
> +    req->cqe.result = cpu_to_le32(result);
> 
> -    req->cqe.result = result;
>      return NVME_SUCCESS;
>  }
> ---
> 

I replaced this patch with a new one earlier in the series that does
what you suggest and then let the change trickle down to other patches
that add feature cases.