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{
    "id": 807258,
    "url": "http://patchwork.ozlabs.org/api/patches/807258/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/20170829200759.13975-3-willemdebruijn.kernel@gmail.com/",
    "project": {
        "id": 7,
        "url": "http://patchwork.ozlabs.org/api/projects/7/?format=api",
        "name": "Linux network development",
        "link_name": "netdev",
        "list_id": "netdev.vger.kernel.org",
        "list_email": "netdev@vger.kernel.org",
        "web_url": null,
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    "msgid": "<20170829200759.13975-3-willemdebruijn.kernel@gmail.com>",
    "list_archive_url": null,
    "date": "2017-08-29T20:07:59",
    "name": "[RFC,2/2] virtio_net: enable probing for NEEDS_RESET support",
    "commit_ref": null,
    "pull_url": null,
    "state": "rfc",
    "archived": true,
    "hash": "98c9ccb48de02fac6c7e5a589752b8dd163399c8",
    "submitter": {
        "id": 67615,
        "url": "http://patchwork.ozlabs.org/api/people/67615/?format=api",
        "name": "Willem de Bruijn",
        "email": "willemdebruijn.kernel@gmail.com"
    },
    "delegate": {
        "id": 34,
        "url": "http://patchwork.ozlabs.org/api/users/34/?format=api",
        "username": "davem",
        "first_name": "David",
        "last_name": "Miller",
        "email": "davem@davemloft.net"
    },
    "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/20170829200759.13975-3-willemdebruijn.kernel@gmail.com/mbox/",
    "series": [
        {
            "id": 458,
            "url": "http://patchwork.ozlabs.org/api/series/458/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=458",
            "date": "2017-08-29T20:07:57",
            "name": "virtio-net: implement reset request",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/458/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/807258/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/807258/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<netdev-owner@vger.kernel.org>",
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        "X-Received": "by 10.200.4.4 with SMTP id v4mr8218073qtg.22.1504037283829;\n\tTue, 29 Aug 2017 13:08:03 -0700 (PDT)",
        "From": "Willem de Bruijn <willemdebruijn.kernel@gmail.com>",
        "To": "netdev@vger.kernel.org",
        "Cc": "mst@redhat.com, jasowang@redhat.com,\n\tvirtualization@lists.linux-foundation.org,\n\tWillem de Bruijn <willemb@google.com>",
        "Subject": "[PATCH RFC 2/2] virtio_net: enable probing for NEEDS_RESET support",
        "Date": "Tue, 29 Aug 2017 16:07:59 -0400",
        "Message-Id": "<20170829200759.13975-3-willemdebruijn.kernel@gmail.com>",
        "X-Mailer": "git-send-email 2.14.1.342.g6490525c54-goog",
        "In-Reply-To": "<20170829200759.13975-1-willemdebruijn.kernel@gmail.com>",
        "References": "<20170829200759.13975-1-willemdebruijn.kernel@gmail.com>",
        "Sender": "netdev-owner@vger.kernel.org",
        "Precedence": "bulk",
        "List-ID": "<netdev.vger.kernel.org>",
        "X-Mailing-List": "netdev@vger.kernel.org"
    },
    "content": "From: Willem de Bruijn <willemb@google.com>\n\nImplement a mechanism to signal that a virtio device implements the\nVIRTIO_CONFIG_S_NEEDS_RESET command.\n\nTesting for VIRTIO_CONFIG_S_NEEDS_RESET support by issuing the request\nand verifying the reset state would require an expensive state change.\n\nTo avoid that, add a status bit to the feature register used during\nfeature negotiation between host and guest.\n\nSet the bit for virtio-net, which supports the feature.\n\nSigned-off-by: Willem de Bruijn <willemb@google.com>\n---\n drivers/net/virtio_net.c           | 2 ++\n include/uapi/linux/virtio_config.h | 3 +++\n 2 files changed, 5 insertions(+)",
    "diff": "diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c\nindex 5e349226f7c1..15483a982106 100644\n--- a/drivers/net/virtio_net.c\n+++ b/drivers/net/virtio_net.c\n@@ -2801,12 +2801,14 @@ static struct virtio_device_id id_table[] = {\n \n static unsigned int features[] = {\n \tVIRTNET_FEATURES,\n+\tVIRTIO_F_CAN_RESET,\n };\n \n static unsigned int features_legacy[] = {\n \tVIRTNET_FEATURES,\n \tVIRTIO_NET_F_GSO,\n \tVIRTIO_F_ANY_LAYOUT,\n+\tVIRTIO_F_CAN_RESET,\n };\n \n static struct virtio_driver virtio_net_driver = {\ndiff --git a/include/uapi/linux/virtio_config.h b/include/uapi/linux/virtio_config.h\nindex 308e2096291f..726be44a04d3 100644\n--- a/include/uapi/linux/virtio_config.h\n+++ b/include/uapi/linux/virtio_config.h\n@@ -56,6 +56,9 @@\n  * suppressed them? */\n #define VIRTIO_F_NOTIFY_ON_EMPTY\t24\n \n+/* Driver supports the VIRTIO_CONFIG_S_NEEDS_RESET command */\n+#define VIRTIO_F_CAN_RESET\t\t25\n+\n /* Can the device handle any descriptor layout? */\n #define VIRTIO_F_ANY_LAYOUT\t\t27\n #endif /* VIRTIO_CONFIG_NO_LEGACY */\n",
    "prefixes": [
        "RFC",
        "2/2"
    ]
}