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@vger.kernel.org # v4.5+ Signed-off-by: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com ---
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); + usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON); + usb3_init_epc_registers(usb3);
if (usb3->driver) usb3->driver->disconnect(&usb3->gadget);