[PATCH 6.1 444/982] virtio_input: reset device if input_register_device() fails

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Xiong Weimin <xiongweimin@kylinos.cn>

[ Upstream commit 81489b32a21c9360f8750d1fb600155d27452e19 ]

Probe marks the device DRIVER_OK with virtio_device_ready() before
calling input_register_device(). If registration fails, the error path
cleared vi->ready and called del_vqs() while the device was still live,
so the device could keep DMA to queues that were already torn down.

Match remove/freeze: call virtio_reset_device() on that path before
tearing down the virtqueues.

Fixes: 271c865161c5 ("Add virtio-input driver.")
Signed-off-by: Xiong Weimin <xiongweimin@kylinos.cn>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260805032931.1606652-1-xiongweimin@kylinos.cn>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/virtio/virtio_input.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/virtio/virtio_input.c b/drivers/virtio/virtio_input.c
index 3aa46703872dc..54d90006e598f 100644
--- a/drivers/virtio/virtio_input.c
+++ b/drivers/virtio/virtio_input.c
@@ -327,6 +327,7 @@ static int virtinput_probe(struct virtio_device *vdev)
 	spin_lock_irqsave(&vi->lock, flags);
 	vi->ready = false;
 	spin_unlock_irqrestore(&vi->lock, flags);
+	virtio_reset_device(vdev);
 err_mt_init_slots:
 	input_free_device(vi->idev);
 err_input_alloc:
-- 
2.53.0