usb: gadget: net2280: reset sequence number on ep enable

Sequence number can be out of sync if endpoint is disabled after some
data transfers and enabled again. Reset it to stay in sync with host.

Tested-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index 62bc15742e10cec199527be769eea1cb473cefee..a91da3640ded8783d3681841b6669d352ac83ea4 100644 (file)
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -123,6 +123,8 @@ static char *type_string(u8 bmAttributes)
 #define valid_bit      cpu_to_le32(BIT(VALID_BIT))
 #define dma_done_ie    cpu_to_le32(BIT(DMA_DONE_INTERRUPT_ENABLE))
 
+static void ep_clear_seqnum(struct net2280_ep *ep);
+
 /*-------------------------------------------------------------------------*/
 static inline void enable_pciirqenb(struct net2280_ep *ep)
 {
@@ -256,6 +258,8 @@ net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
                        BIT(CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp);
        }
 
+       if (dev->quirks & PLX_SUPERSPEED)
+               ep_clear_seqnum(ep);
        writel(tmp, &ep->cfg->ep_cfg);
 
        /* enable irqs */