linux-kernel - Re: [PATCH v2 02/15] virtio: unify config

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Date:	Mon, 6 Oct 2014 17:16:14 +0200
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	virtualization@...ts.linux-foundation.org,
	Christian Borntraeger <borntraeger@...ibm.com>,
	linux390@...ibm.com, Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Sudeep Dutt <sudeep.dutt@...el.com>,
	Ashutosh Dixit <ashutosh.dixit@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Nikhil Rao <nikhil.rao@...el.com>,
	Siva Yerramreddy <yshivakrishna@...il.com>,
	Wolfram Sang <wsa@...-dreams.de>,
	Heinz Graalfs <graalfs@...ux.vnet.ibm.com>,
	linux-s390@...r.kernel.org
Subject: Re: [PATCH v2 02/15] virtio: unify config_changed handling

On Mon, 6 Oct 2014 18:10:44 +0300
"Michael S. Tsirkin" <mst@...hat.com> wrote:

> Replace duplicated code in all transports with a single wrapper in
> virtio.c.
> 
> The only functional change is in virtio_mmio.c: if a buggy device sends
> us an interrupt before driver is set, we previously returned IRQ_NONE,
> now we return IRQ_HANDLED.
> 
> As this must not happen in practice, this does not look like a big deal.
> 
> See also commit 3fff0179e33cd7d0a688dab65700c46ad089e934
> 	virtio-pci: do not oops on config change if driver not loaded.
> for the original motivation behind the driver check.
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> ---
>  include/linux/virtio.h             | 2 ++
>  drivers/misc/mic/card/mic_virtio.c | 6 +-----
>  drivers/s390/kvm/kvm_virtio.c      | 9 +--------
>  drivers/s390/kvm/virtio_ccw.c      | 6 +-----
>  drivers/virtio/virtio.c            | 9 +++++++++
>  drivers/virtio/virtio_mmio.c       | 7 ++-----
>  drivers/virtio/virtio_pci.c        | 6 +-----
>  7 files changed, 17 insertions(+), 28 deletions(-)

Reviewed-by: Cornelia Huck <cornelia.huck@...ibm.com>

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