linux-kernel - Re: [PATCH v7] usb: common: usb-conn-gpio: Set last role to unknown before initial detection

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Date:   Wed, 31 May 2023 20:17:23 +0530
From:   Prashanth K <quic_prashk@...cinc.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7] usb: common: usb-conn-gpio: Set last role to unknown
 before initial detection



On 31-05-23 08:11 pm, Prashanth K wrote:
>   
> diff --git a/drivers/usb/musb/jz4740.c b/drivers/usb/musb/jz4740.c
> index 5aabdd7..6d880c4 100644
> --- a/drivers/usb/musb/jz4740.c
> +++ b/drivers/usb/musb/jz4740.c
> @@ -95,6 +95,8 @@ static int jz4740_musb_role_switch_set(struct usb_role_switch *sw,
>   	case USB_ROLE_HOST:
>   		atomic_notifier_call_chain(&phy->notifier, USB_EVENT_ID, phy);
>   		break;
> +	default:
> +		break;
>   	}
>   
>   	return 0;
> diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c b/drivers/usb/roles/intel-xhci-usb-role-switch.c
> index 5c96e92..4d6a3dd 100644
> --- a/drivers/usb/roles/intel-xhci-usb-role-switch.c
> +++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c
> @@ -97,6 +97,8 @@ static int intel_xhci_usb_set_role(struct usb_role_switch *sw,
>   		val |= SW_VBUS_VALID;
>   		drd_config = DRD_CONFIG_STATIC_DEVICE;
>   		break;
> +	default:
> +		break;
>   	}
>   	val |= SW_IDPIN_EN;
>   	if (data->enable_sw_switch) {
> diff --git a/include/linux/usb/role.h b/include/linux/usb/role.h
> index b5deafd..65e790a 100644
> --- a/include/linux/usb/role.h
> +++ b/include/linux/usb/role.h
> @@ -11,6 +11,7 @@ enum usb_role {
>   	USB_ROLE_NONE,
>   	USB_ROLE_HOST,
>   	USB_ROLE_DEVICE,
> +	USB_ROLE_UNKNOWN,
>   };
>   
>   typedef int (*usb_role_switch_set_t)(struct usb_role_switch *sw,

Hi Greg, I have fixed the drivers that doesn't have default case while 
using usb_role enum. Added the same on intel-xhci-usb-role-switch.c & 
musb/jz4740.c files. I was able to compile successfully. Please check 
once if this fixed the build issue.

Thanks in advance,
Prashanth K