usb: gadget: udc: renesas_usb3: fix maxpacket size of ep0

This patch fixes an issue that maxpacket size of ep0 is incorrect
for SuperSpeed. Otherwise, CDC NCM class with SuperSpeed doesn't
work correctly on this driver because its control read data size
is more than 64 bytes.

Reported-by: Junki Kato <junki.kato.xk@renesas.com>
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>
Tested-by: Junki Kato <junki.kato.xk@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
index 1f879b3f2c96ad1f7dc417da185a545d0e52a484..e1656f361e081d398d8ab55820a00cf9497f3562 100644 (file)
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -812,12 +812,15 @@ static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3)
        switch (speed) {
        case USB_STA_SPEED_SS:
                usb3->gadget.speed = USB_SPEED_SUPER;
+               usb3->gadget.ep0->maxpacket = USB3_EP0_SS_MAX_PACKET_SIZE;
                break;
        case USB_STA_SPEED_HS:
                usb3->gadget.speed = USB_SPEED_HIGH;
+               usb3->gadget.ep0->maxpacket = USB3_EP0_HSFS_MAX_PACKET_SIZE;
                break;
        case USB_STA_SPEED_FS:
                usb3->gadget.speed = USB_SPEED_FULL;
+               usb3->gadget.ep0->maxpacket = USB3_EP0_HSFS_MAX_PACKET_SIZE;
                break;
        default:
                usb3->gadget.speed = USB_SPEED_UNKNOWN;
@@ -2513,7 +2516,7 @@ static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev,
                        /* for control pipe */
                        usb3->gadget.ep0 = &usb3_ep->ep;
                        usb_ep_set_maxpacket_limit(&usb3_ep->ep,
-                                               USB3_EP0_HSFS_MAX_PACKET_SIZE);
+                                               USB3_EP0_SS_MAX_PACKET_SIZE);
                        usb3_ep->ep.caps.type_control = true;
                        usb3_ep->ep.caps.dir_in = true;
                        usb3_ep->ep.caps.dir_out = true;