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i2c: virtio: mark device ready before registering the adapter

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virtio_i2c_probe() synchronously probes child i2c drivers on the bus,
but peripherals may use the bus at probe for tasks like reading a chip
id. The vhost-user-i2c backend stalls at such probes unless DRIVER_OK
is already set before the virtqueue is first kicked.

Set DRIVER_OK explicitly before i2c_add_adapter(), as done for the
same reason in commit f5866db64f ("virtio_console: enable VQs
early") and commit 71e4b8bf04 ("virtio_rpmsg: set DRIVER_OK before
using device").

Signed-off-by: Alexis Bouzigues <BouziguesAlexis@JohnDeere.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Alexis Bouzigues
2026-05-29 09:28:14 -05:00
committed by Wolfram Sang
parent e2aecff95b
commit 1d774589f9
1 changed files with 2 additions and 0 deletions
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2
drivers/i2c/busses/i2c-virtio.c
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@@ -222,6 +222,8 @@ static int virtio_i2c_probe(struct virtio_device *vdev)
*/
ACPI_COMPANION_SET(&vi->adap.dev, ACPI_COMPANION(vdev->dev.parent));
virtio_device_ready(vdev);
ret = i2c_add_adapter(&vi->adap);
if (ret)
virtio_i2c_del_vqs(vdev);