Jason Wang 7cf7ed8f23 caif_virtio: fix race between virtio_device_ready() and ndo_open() ... commit 11a37eb668 upstream. We currently depend on probe() calling virtio_device_ready() - which happens after netdev registration. Since ndo_open() can be called immediately after register_netdev, this means there exists a race between ndo_open() and virtio_device_ready(): the driver may start to use the device (e.g. TX) before DRIVER_OK which violates the spec. Fix this by switching to use register_netdevice() and protect the virtio_device_ready() with rtnl_lock() to make sure ndo_open() can only be called after virtio_device_ready(). Fixes: 0d2e1a2926 ("caif_virtio: Introduce caif over virtio") Signed-off-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220620051115.3142-3-jasowang@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-07-07 17:53:27 +02:00
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caif_serial.c
caif_virtio.c	caif_virtio: fix race between virtio_device_ready() and ndo_open()	2022-07-07 17:53:27 +02:00
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