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

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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>
This commit is contained in:
Sevak Arakelyan 2016-11-16 15:33:52 -08:00 committed by Felipe Balbi
parent 36daf3aa39
commit 9d8da85798
1 changed files with 6 additions and 1 deletions
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7
drivers/usb/dwc2/hcd_intr.c
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@ -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;