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usb: dwc2: host: fix the data toggle error in full speed descriptor dma 

There will be data toggle error happen for full speed buld-out transfer.
The data toggle bit is saved in qh for non-control transfers, it is wrong
to  check the qtd for that case.

Also fix one static analysis tool issue after fix the data toggle error.

John Youn:
* Added WARN() to warn on improper usage of the
  dwc2_hcd_save_data_toggle() function.

Signed-off-by: Dyson Lee <dyson.lee@intel.com>
Signed-off-by: Tang, Jianqiang <jianqiang.tang@intel.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Tang, Jianqiang 2016-02-16 15:02:07 -08:00 committed by Felipe Balbi
parent 3142a16b98
commit 62943b7dfa
2 changed files with 9 additions and 1 deletions
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2
drivers/usb/dwc2/hcd_ddma.c
View File

@ -1257,7 +1257,7 @@ stop_scan:
*/
if (halt_status == DWC2_HC_XFER_STALL)
qh->data_toggle = DWC2_HC_PID_DATA0;
else if (qtd)
else
dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
}

8
drivers/usb/dwc2/hcd_intr.c
View File

@ -525,11 +525,19 @@ void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg,
u32 pid = (hctsiz & TSIZ_SC_MC_PID_MASK) >> TSIZ_SC_MC_PID_SHIFT;
if (chan->ep_type != USB_ENDPOINT_XFER_CONTROL) {
if (WARN(!chan || !chan->qh,
"chan->qh must be specified for non-control eps\n"))
return;
if (pid == TSIZ_SC_MC_PID_DATA0)
chan->qh->data_toggle = DWC2_HC_PID_DATA0;
else
chan->qh->data_toggle = DWC2_HC_PID_DATA1;
} else {
if (WARN(!qtd,
"qtd must be specified for control eps\n"))
return;
if (pid == TSIZ_SC_MC_PID_DATA0)
qtd->data_toggle = DWC2_HC_PID_DATA0;
else