On Tue, May 15, 2018 at 07:49:44AM +0000, Yoshihiro Shimoda wrote:
> Hi Simon-san,
>
> Thank you for your review!
>
> > From: Simon Horman, Sent: Tuesday, May 15, 2018 4:35 PM
> >
> > On Tue, Apr 10, 2018 at 02:38:54PM +0900, Yoshihiro Shimoda wrote:
> > > This patch fixes an issue that reconnection is possible to fail
> > > because unexpected state handling happens by the irqs. To fix the issue,
> > > the driver disables the controller's irqs when disconnected.
> > >
> > > Fixes: 746bfe63bba3 ("usb: gadget: renesas_usb3: add support for Renesas USB3.0 peripheral controller")
> > > Cc: <stable@xxxxxxxxxxxxxxx> # v4.5+
> > > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> > > ---
> > >
> > > Remarks:
> > > - A new file in v2
> > >
> > > drivers/usb/gadget/udc/renesas_usb3.c | 7 +++++++
> > > 1 file changed, 7 insertions(+)
> > >
> > > diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
> > > index 0e70163..5caf78b 100644
> > > --- a/drivers/usb/gadget/udc/renesas_usb3.c
> > > +++ b/drivers/usb/gadget/udc/renesas_usb3.c
> > > @@ -623,6 +623,13 @@ static void usb3_disconnect(struct renesas_usb3 *usb3)
> > > usb3_usb2_pullup(usb3, 0);
> > > usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
> > > usb3_reset_epc(usb3);
> > > + usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM | USB_INT_1_B3_PLLWKUP |
> > > + USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
> > > + USB_INT_1_SPEED | USB_INT_1_B3_WRMRST |
> > > + USB_INT_1_B3_HOTRST | USB_INT_1_B2_SPND |
> > > + USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
> >
> > Hi Shimoda-san,
> >
> > is it intentional that USB_INT_1_VBUS_CNG is not disabled above?
>
> Yes, because the USB_INT_1_VBUS_CNG is enabled in usb3_init_epc_registers() below.
Thanks for the clarification,
Reviewed-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
>
> > > + usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
> > > + usb3_init_epc_registers(usb3);
>
> Best regards,
> Yoshihiro Shimoda
>
> > > if (usb3->driver)
> > > usb3->driver->disconnect(&usb3->gadget);
> > > --
> > > 1.9.1
> > >
>
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