[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <ebbbee51-8792-6c35-c29b-adb7f83dda23@collabora.com>
Date: Wed, 24 May 2023 11:40:15 +0200
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: Prashanth K <quic_prashk@...cinc.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Matthias Brugger <matthias.bgg@...il.com>
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: common: usb-conn-gpio: Set last role to unknown
before initial detection
Il 24/05/23 10:54, Prashanth K ha scritto:
> Currently if we bootup a device without cable connected, then
> usb-conn-gpio won't call set_role() since last_role is same as
> current role. This happens because during probe last_role gets
> initialised to zero.
>
> To avoid this, last_role is set to USB_ROLE_UNKNOWN before
> performing the initial detection.
>
> Fixes: 4602f3bff266 ("usb: common: add USB GPIO based connection detection driver")
> Signed-off-by: Prashanth K <quic_prashk@...cinc.com>
> ---
> drivers/usb/common/usb-conn-gpio.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/usb/common/usb-conn-gpio.c b/drivers/usb/common/usb-conn-gpio.c
> index e20874c..00af735 100644
> --- a/drivers/usb/common/usb-conn-gpio.c
> +++ b/drivers/usb/common/usb-conn-gpio.c
> @@ -27,6 +27,8 @@
> #define USB_CONN_IRQF \
> (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT)
>
> +#define USB_ROLE_UNKNOWN -1
I would add USB_ROLE_UNKNOWN to `enum usb_role` instead.
enum usb_role {
USB_ROLE_UNKNOWN = -1,
USB_ROLE_NONE,
....
};
Regards,
Angelo
> +
> struct usb_conn_info {
> struct device *dev;
> struct usb_role_switch *role_sw;
> @@ -257,6 +259,9 @@ static int usb_conn_probe(struct platform_device *pdev)
> platform_set_drvdata(pdev, info);
> device_set_wakeup_capable(&pdev->dev, true);
>
> + /* Set last role to unknown before performing the initial detection */
> + info->last_role = USB_ROLE_UNKNOWN;
> +
> /* Perform initial detection */
> usb_conn_queue_dwork(info, 0);
>
Powered by blists - more mailing lists