usb: dwc2: gadget: fix missing process for isoc descriptor dma mode

Message ID 1527681676-44003-1-git-send-email-prime.zeng@hisilicon.com
State New
Headers show
Series
  • usb: dwc2: gadget: fix missing process for isoc descriptor dma mode
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Commit Message

Zeng Tao May 30, 2018, 12:01 p.m.
If it's the first request to queue, and we are using descriptor dma mode
for isoc transfer, we only need to add the request to the queue, and it
will be processed in the future nak interrupt handler.

Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com>

---
 drivers/usb/dwc2/gadget.c | 3 +++
 1 file changed, 3 insertions(+)

-- 
2.7.4

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Patch

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index f0d9ccf..48e3a48c 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -1365,6 +1365,9 @@  static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 			return 0;
 		}
 
+		if (using_desc_dma(hs))
+			return 0;
+
 		/* Update current frame number value. */
 		hs->frame_number = dwc2_hsotg_read_frameno(hs);
 		while (dwc2_gadget_target_frame_elapsed(hs_ep)) {