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Date: Fri, 15 Mar 2013 09:15:10 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 2/2] virtio-scsi: Pack struct
	virtio_scsi_{req_cmd, resp_cmd}
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To: Asias He <asias@redhat.com>
Cc: target-devel@vger.kernel.org, kvm@vger.kernel.org, "Michael S. Tsirkin" <mst@redhat.com>, seabios@seabios.org, qemu-devel@nongnu.org, Nicholas Bellinger <nab@linux-iscsi.org>, virtualization@lists.linux-foundation.org, Kevin O'Connor <kevin@koconnor.net>, Stefan Hajnoczi <stefanha@redhat.com>

Il 15/03/2013 02:45, Asias He ha scritto:
> Device needs the exact size of these data structure. Prevent padding.
> 
> This fixes guest hang when booting seabios + tcm_vhost.
> 
> Signed-off-by: Asias He <asias@redhat.com>
> ---
>  src/virtio-scsi.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/src/virtio-scsi.h b/src/virtio-scsi.h
> index bbfbf30..96c3701 100644
> --- a/src/virtio-scsi.h
> +++ b/src/virtio-scsi.h
> @@ -26,7 +26,7 @@ struct virtio_scsi_req_cmd {
>      u8 prio;
>      u8 crn;
>      char cdb[VIRTIO_SCSI_CDB_SIZE];
> -};
> +} __attribute__((packed));
>  
>  /* This is the first element of the "in" scatter-gather list. */
>  struct virtio_scsi_resp_cmd {
> @@ -36,7 +36,7 @@ struct virtio_scsi_resp_cmd {
>      u8 status;
>      u8 response;
>      u8 sense[VIRTIO_SCSI_SENSE_SIZE];
> -};
> +} __attribute__((packed));
>  
>  #define VIRTIO_SCSI_S_OK            0
>  
> 

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>