| Message ID | 1538b1dfe07cb3fee30acbc8a21e44678032c088.1585523081.git.thinhn@synopsys.com (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | f7ac582effc6ee416eb51e0c3e55836aaf7231ac |
| Headers | show |
| Series | usb: dwc3: gadget: Improve isoc starting mechanism | expand |
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index ee87b7b383f6..1a4fc03742aa 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -356,6 +356,8 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd, ret = 0; break; case DEPEVT_TRANSFER_NO_RESOURCE: + dev_WARN(dwc->dev, "No resource for %s\n", + dep->name); ret = -EINVAL; break; case DEPEVT_TRANSFER_BUS_EXPIRY:
If the driver issued START_TRANSFER and received a no-resource status, then generally there are a few reasons for this: 1) The driver did not allocate resource for the endpoint during power-on-reset initialization. 2) The transfer resource was reset. At this moment, we don't do this in the driver, but it occurs when the driver issues START_CONFIG cmd to ep0 with resource index=2. 3) The driver issues the START_TRANSFER command to an already started endpoint. Usually, this is because the END_TRANSFER command hasn't completed yet. Print out a warning to help debug this issue in the driver. Signed-off-by: Thinh Nguyen <thinhn@synopsys.com> --- drivers/usb/dwc3/gadget.c | 2 ++ 1 file changed, 2 insertions(+)