Re: [PATCH v2 1/2] Revert "tcpm: allow looking for role_sw device in the main node"

[Arnaud Ferraris]

Le 09/03/2026 à 08:43, Xu Yang a écrit :
> This reverts commit 1366cd228b0c67b60a2c0c26ef37fe9f7cfedb7f.
>
> The fwnode_usb_role_switch_get() returns NULL only if no connection is
> found, returns ERR_PTR(-EPROBE_DEFER) if connection is found but deferred
> probe is needed, or a valid pointer of usb_role_switch.
>
> When switching from a NULL check to IS_ERR_OR_NULL(), usb_role_switch_get()
> returns NULL and overwrites the ERR_PTR(-EPROBE_DEFER) returned by
> fwnode_usb_role_switch_get(). This causes the deferred probe indication to
> be lost, preventing the USB role switch from ever being retrieved.
>
> Fixes: 1366cd228b0c ("tcpm: allow looking for role_sw device in the main node")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Xu Yang <xu.yang_2@xxxxxxx>
>
> ---
> Changes in v2:
>   - no changes
> ---
>   drivers/usb/typec/tcpm/tcpm.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 1d2f3af034c5..8e0e14a2704e 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -7890,7 +7890,7 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
>   	port->partner_desc.identity = &port->partner_ident;
>   
>   	port->role_sw = fwnode_usb_role_switch_get(tcpc->fwnode);
> -	if (IS_ERR_OR_NULL(port->role_sw))
> +	if (!port->role_sw)
>   		port->role_sw = usb_role_switch_get(port->dev);
>   	if (IS_ERR(port->role_sw)) {
>   		err = PTR_ERR(port->role_sw);

Tested-by: Arnaud Ferraris <arnaud.ferraris@xxxxxxxxxxxxx>

Cheers,
Arnaud