diff options
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 5e015631413c..3a6427149738 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -521,7 +521,17 @@ static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); if (desc->bInterval) { - params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); + u8 bInterval_m1; + + /* + * Valid range for DEPCFG.bInterval_m1 is from 0 to 13, and it + * must be set to 0 when the controller operates in full-speed. + */ + bInterval_m1 = min_t(u8, desc->bInterval - 1, 13); + if (dwc->gadget.speed == USB_SPEED_FULL) + bInterval_m1 = 0; + + params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(bInterval_m1); dep->interval = 1 << (desc->bInterval - 1); } |