4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Yoshihiro Shimoda <[email protected]> commit afc92514a34c7414b28047b1205a6b709103c699 upstream. If the "workaround_for_vbus" is true, the driver will not call usb_disconnect(). So, since the controller keeps some registers' value, the driver doesn't re-enumarate suitable speed after the b-device mode is disabled. To fix the issue, this patch adds usb_disconnect() calling in renesas_usb3_b_device_write() if workaround_for_vbus is true. Fixes: 43ba968b00ea ("usb: gadget: udc: renesas_usb3: add debugfs to set the b-device mode") Cc: <[email protected]> # v4.14+ Signed-off-by: Yoshihiro Shimoda <[email protected]> Signed-off-by: Felipe Balbi <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/usb/gadget/udc/renesas_usb3.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -2374,6 +2374,9 @@ static ssize_t renesas_usb3_b_device_wri else usb3->forced_b_device = false; + if (usb3->workaround_for_vbus) + usb3_disconnect(usb3); + /* Let this driver call usb3_connect() anyway */ usb3_check_id(usb3);
