diff options
Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 6f6f0b3be3ad..aea9a5b948b4 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1261,14 +1261,24 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) __dwc3_gadget_start_isoc(dwc, dep, cur_uf); dep->flags &= ~DWC3_EP_PENDING_REQUEST; } + return 0; } - return 0; + + if ((dep->flags & DWC3_EP_BUSY) && + !(dep->flags & DWC3_EP_MISSED_ISOC)) { + WARN_ON_ONCE(!dep->resource_index); + ret = __dwc3_gadget_kick_transfer(dep, + dep->resource_index); + } + + goto out; } if (!dwc3_calc_trbs_left(dep)) return 0; ret = __dwc3_gadget_kick_transfer(dep, 0); +out: if (ret == -EBUSY) ret = 0; @@ -3026,6 +3036,15 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3_event_buffer *evt) return IRQ_HANDLED; } + /* + * With PCIe legacy interrupt, test shows that top-half irq handler can + * be called again after HW interrupt deassertion. Check if bottom-half + * irq event handler completes before caching new event to prevent + * losing events. + */ + if (evt->flags & DWC3_EVENT_PENDING) + return IRQ_HANDLED; + count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0)); count &= DWC3_GEVNTCOUNT_MASK; if (!count) |