| Message ID | 20230322092740.28491-2-quic_kriskura@quicinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Handle core soft reset during Pullup | expand |
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 3c63fa97a680..f0472801d9a5 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2620,13 +2620,16 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) * device-initiated disconnect requires a core soft reset * (DCTL.CSftRst) before enabling the run/stop bit. */ - dwc3_core_soft_reset(dwc); + ret = dwc3_core_soft_reset(dwc); + if (ret) + goto done; dwc3_event_buffers_setup(dwc); __dwc3_gadget_start(dwc); ret = dwc3_gadget_run_stop(dwc, true, false); } +done: pm_runtime_put(dwc->dev); return ret;
If the core soft reset timeout happens, avoid setting up event buffers and starting gadget as the writes to these registers may not reflect when in reset and setting the run stop bit can lead the controller to access wrong event buffer address resulting in a crash. Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com> --- drivers/usb/dwc3/gadget.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)