From: John Youn <johnyoun@xxxxxxxxxxxx> Clears out all the TRBs in the ring to clean up any stale data that might be in them from the previous time the endpoint was enabled. Also removed the existing clear of the LINK trb since the entire ring is cleard just before. Signed-off-by: John Youn <johnyoun@xxxxxxxxxxxx> Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> --- drivers/usb/dwc3/gadget.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index a05eb50b789c..7755b07fa956 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -563,12 +563,16 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, if (usb_endpoint_xfer_control(desc)) return 0; + /* Initialize the TRB ring */ + dep->trb_dequeue = 0; + dep->trb_enqueue = 0; + memset(dep->trb_pool, 0, + sizeof(struct dwc3_trb) * DWC3_TRB_NUM); + /* Link TRB. The HWO bit is never reset */ trb_st_hw = &dep->trb_pool[0]; trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; - memset(trb_link, 0, sizeof(*trb_link)); - trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; -- 2.8.3 --------------------------------------------------------------------- Intel Finland Oy Registered Address: PL 281, 00181 Helsinki Business Identity Code: 0357606 - 4 Domiciled in Helsinki This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
