linux-kernel - [RFC PATCH 12/15] virtio-input: Handle virtio_device

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Message-Id: <20210517093428.670-13-xieyongji@bytedance.com>
Date:   Mon, 17 May 2021 17:34:25 +0800
From:   Xie Yongji <xieyongji@...edance.com>
To:     mst@...hat.com, jasowang@...hat.com, stefanha@...hat.com
Cc:     amit@...nel.org, arei.gonglei@...wei.com, airlied@...ux.ie,
        kraxel@...hat.com, jean-philippe@...aro.org, ohad@...ery.com,
        bjorn.andersson@...aro.org, david@...hat.com, vgoyal@...hat.com,
        miklos@...redi.hu, lucho@...kov.net, asmadeus@...ewreck.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH 12/15] virtio-input: Handle virtio_device_ready() failure

Now virtio_device_ready() will return error if we get
invalid status. Let's handle this case in both probe
and resume paths.

Signed-off-by: Xie Yongji <xieyongji@...edance.com>
---
 drivers/virtio/virtio_input.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/virtio/virtio_input.c b/drivers/virtio/virtio_input.c
index f83f8e556fba..a94940efad7a 100644
--- a/drivers/virtio/virtio_input.c
+++ b/drivers/virtio/virtio_input.c
@@ -312,7 +312,10 @@ static int virtinput_probe(struct virtio_device *vdev)
 		}
 	}
 
-	virtio_device_ready(vdev);
+	err = virtio_device_ready(vdev);
+	if (err)
+		goto err_mt_init_slots;
+
 	vi->ready = true;
 	err = input_register_device(vi->idev);
 	if (err)
@@ -375,7 +378,11 @@ static int virtinput_restore(struct virtio_device *vdev)
 	if (err)
 		return err;
 
-	virtio_device_ready(vdev);
+	err = virtio_device_ready(vdev);
+	if (err) {
+		vdev->config->del_vqs(vdev);
+		return err;
+	}
 	vi->ready = true;
 	virtinput_fill_evt(vi);
 	return 0;
-- 
2.11.0