usb: dwc2: Stop Complete Splits after Data PID == 0

Stop sending complete split requests in case of ISOC IN split transfers
after getting data with PID0. Otherwise we will get a NYET for each
additional IN token.

Signed-off-by: Sevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c
index 0f2633434b891bc9a3633a2ff3ccf3567cfc3067..b8f4b6aaf1d0fae7531c16b2cd03e5997c92479d 100644 (file)
--- a/drivers/usb/dwc2/hcd_intr.c
+++ b/drivers/usb/dwc2/hcd_intr.c
@@ -915,6 +915,8 @@ static int dwc2_xfercomp_isoc_split_in(struct dwc2_hsotg *hsotg,
 {
        struct dwc2_hcd_iso_packet_desc *frame_desc;
        u32 len;
+       u32 hctsiz;
+       u32 pid;
 
        if (!qtd->urb)
                return 0;
@@ -932,7 +934,10 @@ static int dwc2_xfercomp_isoc_split_in(struct dwc2_hsotg *hsotg,
 
        qtd->isoc_split_offset += len;
 
-       if (frame_desc->actual_length >= frame_desc->length) {
+       hctsiz = dwc2_readl(hsotg->regs + HCTSIZ(chnum));
+       pid = (hctsiz & TSIZ_SC_MC_PID_MASK) >> TSIZ_SC_MC_PID_SHIFT;
+
+       if (frame_desc->actual_length >= frame_desc->length || pid == 0) {
                frame_desc->status = 0;
                qtd->isoc_frame_index++;
                qtd->complete_split = 0;