This is a note to let you know that I've just added the patch titled usb: dwc3: Do not get extcon device when usb-role-switch is used to the 6.0-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-dwc3-do-not-get-extcon-device-when-usb-role-switch-is-used.patch and it can be found in the queue-6.0 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From d68cc25b7c7fb3034c5a5b5f350a0b858c6d5a45 Mon Sep 17 00:00:00 2001 From: Janne Grunau <j@xxxxxxxxxx> Date: Sun, 6 Nov 2022 22:48:04 +0100 Subject: usb: dwc3: Do not get extcon device when usb-role-switch is used From: Janne Grunau <j@xxxxxxxxxx> commit d68cc25b7c7fb3034c5a5b5f350a0b858c6d5a45 upstream. The change breaks device tree based platforms with PHY device and use usb-role-switch instead of an extcon switch. extcon_find_edev_by_node() will return EPROBE_DEFER if it can not find a device so probing without an extcon device will be deferred indefinitely. Fix this by explicitly checking for usb-role-switch. At least the out-of-tree USB3 support on Apple silicon based platforms using dwc3 with tipd USB Type-C and PD controller is affected by this issue. Fixes: d182c2e1bc92 ("usb: dwc3: Don't switch OTG -> peripheral if extcon is present") Cc: stable@xxxxxxxxxx Signed-off-by: Janne Grunau <j@xxxxxxxxxx> Acked-by: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx> Reviewed-by: Sven Peter <sven@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20221106214804.2814-1-j@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/dwc3/core.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1711,6 +1711,16 @@ static struct extcon_dev *dwc3_get_extco return extcon_get_extcon_dev(name); /* + * Check explicitly if "usb-role-switch" is used since + * extcon_find_edev_by_node() can not be used to check the absence of + * an extcon device. In the absence of an device it will always return + * EPROBE_DEFER. + */ + if (IS_ENABLED(CONFIG_USB_ROLE_SWITCH) && + device_property_read_bool(dev, "usb-role-switch")) + return NULL; + + /* * Try to get an extcon device from the USB PHY controller's "port" * node. Check if it has the "port" node first, to avoid printing the * error message from underlying code, as it's a valid case: extcon Patches currently in stable-queue which might be from j@xxxxxxxxxx are queue-6.0/usb-dwc3-do-not-get-extcon-device-when-usb-role-switch-is-used.patch