diff options
Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index e94971a7f468..c4e91c6d4fce 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -27,7 +27,7 @@ #include "gadget.h" #include "io.h" -#define DWC3_ALIGN_FRAME(d) (((d)->frame_number + (d)->interval) \ +#define DWC3_ALIGN_FRAME(d, n) (((d)->frame_number + ((d)->interval * (n))) \ & ~((d)->interval - 1)) /** @@ -1384,6 +1384,8 @@ static int dwc3_gadget_start_isoc_quirk(struct dwc3_ep *dep) static int __dwc3_gadget_start_isoc(struct dwc3_ep *dep) { struct dwc3 *dwc = dep->dwc; + int ret; + int i; if (list_empty(&dep->pending_list)) { dep->flags |= DWC3_EP_PENDING_REQUEST; @@ -1400,8 +1402,15 @@ static int __dwc3_gadget_start_isoc(struct dwc3_ep *dep) return dwc3_gadget_start_isoc_quirk(dep); } - dep->frame_number = DWC3_ALIGN_FRAME(dep); - return __dwc3_gadget_kick_transfer(dep); + for (i = 0; i < DWC3_ISOC_MAX_RETRIES; i++) { + dep->frame_number = DWC3_ALIGN_FRAME(dep, i + 1); + + ret = __dwc3_gadget_kick_transfer(dep); + if (ret != -EAGAIN) + break; + } + + return ret; } static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) |