android_kernel_samsung_sm8650/drivers/net/caif
Jason Wang b05f74c17b UPSTREAM: caif_virtio: fix race between virtio_device_ready() and ndo_open()
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>
(cherry picked from commit 11a37eb668)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I7abe77d08c92c561676def322baf54fa1fce58a8
2022-07-01 20:24:03 +00:00
..
caif_serial.c net: caif: Use netif_rx(). 2022-03-04 12:02:19 +00:00
caif_virtio.c UPSTREAM: caif_virtio: fix race between virtio_device_ready() and ndo_open() 2022-07-01 20:24:03 +00:00
Kconfig net: remove the caif_hsi driver 2021-07-01 13:19:48 -07:00
Makefile net: remove the caif_hsi driver 2021-07-01 13:19:48 -07:00