From 9d8da85798cb45c803e449284c4564d572756428 Mon Sep 17 00:00:00 2001 From: Sevak Arakelyan Date: Wed, 16 Nov 2016 15:33:52 -0800 Subject: [PATCH] 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 Signed-off-by: John Youn Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/hcd_intr.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c index 0f2633434b89..b8f4b6aaf1d0 100644 --- 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; -- 2.20.1