>From USB 2.0 specification, section 9.4.5:
ClearFeature(ENDPOINT_HALT) request always results in
the data toggle being reinitialized to DATA0.
The hacky solution for now is to reset the toggle bit to DATA0 when
the host controller send a ClearFeature request on an endpoint.
Signed-off-by: Jules Maselbas <jmaselbas@xxxxxxxxx>
---
drivers/usb/dwc2/host.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/usb/dwc2/host.c b/drivers/usb/dwc2/host.c
index 5be101752..e6344ea41 100644
--- a/drivers/usb/dwc2/host.c
+++ b/drivers/usb/dwc2/host.c
@@ -372,7 +372,23 @@ int dwc2_submit_control_msg(struct usb_device *udev,
if (ret)
return ret;
+ if (setup->requesttype == USB_RECIP_ENDPOINT
+ && setup->request == USB_REQ_CLEAR_FEATURE) {
+ /* From USB 2.0, section 9.4.5:
+ * ClearFeature(ENDPOINT_HALT) request always results
+ * in the data toggle being reinitialized to DATA0.
+ */
+ int ep = usb_pipeendpoint(pipe);
+ int data0 = TSIZ_SC_MC_PID_DATA0;
+
+ if (usb_pipein(pipe))
+ dwc2->in_data_toggle[devnum][ep] = data0;
+ else
+ dwc2->out_data_toggle[devnum][ep] = data0;
+ }
+
udev->act_len = act_len;
+ udev->status = 0;
return 0;
}
--
2.21.0.196.g041f5ea
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