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>

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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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drivers/i2c/busses/i2c-virtio.c

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