Re: [Qemu-devel] [PATCH v6 5/8] virtio-blk: use virtio wrappers to access headers

[Alexander Graf <agraf@suse.de>]

On 03/28/2014 11:57 AM, Greg Kurz wrote:
> From: Rusty Russell <rusty@rustcorp.com.au>
>
> Note that st*_raw and ld*_raw are effectively replaced by st*_p and ld*_p.
>
> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
> [ use per-device needs_byteswap flag,
>    Greg Kurz <gkurz@linux.vnet.ibm.com> ]
> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
> ---
>   hw/block/virtio-blk.c |   40 +++++++++++++++++++++++-----------------
>   1 file changed, 23 insertions(+), 17 deletions(-)
>
> diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
> index 8a568e5..c652ff2 100644
> --- a/hw/block/virtio-blk.c
> +++ b/hw/block/virtio-blk.c
> @@ -26,6 +26,7 @@
>   # include <scsi/sg.h>
>   #endif
>   #include "hw/virtio/virtio-bus.h"
> +#include "hw/virtio/virtio-access.h"
>   
>   typedef struct VirtIOBlockReq
>   {
> @@ -77,7 +78,9 @@ static void virtio_blk_rw_complete(void *opaque, int ret)
>       trace_virtio_blk_rw_complete(req, ret);
>   
>       if (ret) {
> -        bool is_read = !(ldl_p(&req->out->type) & VIRTIO_BLK_T_OUT);
> +        bool is_read =
> +            !(virtio_ldl_p(&req->out->type,
> +                           VIRTIO_DEVICE(req->dev)) & VIRTIO_BLK_T_OUT);

Any way you could fit this into the line limit by extracting part of it 
into a separate variable?


Alex