From mboxrd@z Thu Jan  1 00:00:00 1970
From: Cornelia Huck <cornelia.huck@de.ibm.com>
Subject: Re: [PATCH v7 42/46] virtio_scsi: v1.0 support
Date: Mon, 1 Dec 2014 13:50:01 +0100
Message-ID: <20141201135001.142bd29a.cornelia.huck@de.ibm.com>
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: thuth@linux.vnet.ibm.com, linux-scsi@vger.kernel.org, rusty@au1.ibm.com, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, dahi@linux.vnet.ibm.com, "James E.J. Bottomley" <JBottomley@parallels.com>, pbonzini@redhat.com, David Miller <davem@davemloft.net>
List-Id: linux-scsi@vger.kernel.org

On Sun, 30 Nov 2014 17:12:47 +0200
"Michael S. Tsirkin" <mst@redhat.com> wrote:

> Note: for consistency, and to avoid sparse errors,
>   convert all fields, even those no longer in use
>   for virtio v1.0.
> 
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> Acked-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  include/linux/virtio_scsi.h | 32 +++++++++++++++-------------
>  drivers/scsi/virtio_scsi.c  | 51 ++++++++++++++++++++++++++++-----------------
>  2 files changed, 49 insertions(+), 34 deletions(-)
> 

> @@ -196,10 +196,13 @@ static void virtscsi_complete_cmd(struct virtio_scsi *vscsi, void *buf)
>  		break;
>  	}
> 
> -	WARN_ON(resp->sense_len > VIRTIO_SCSI_SENSE_SIZE);
> +	WARN_ON(virtio32_to_cpu(vscsi->vdev, resp->sense_len) >
> +		VIRTIO_SCSI_SENSE_SIZE);

Introduce a local variable for this? Might make this statement and the
min_t statement below easier to read.

>  	if (sc->sense_buffer) {
>  		memcpy(sc->sense_buffer, resp->sense,
> -		       min_t(u32, resp->sense_len, VIRTIO_SCSI_SENSE_SIZE));
> +		       min_t(u32,
> +			     virtio32_to_cpu(vscsi->vdev, resp->sense_len),
> +			     VIRTIO_SCSI_SENSE_SIZE));
>  		if (resp->sense_len)
>  			set_driver_byte(sc, DRIVER_SENSE);
>  	}

Otherwise looks good to me.