UHCI: Disable isochronous transfers support.

It busyloops, and at least on QEMU, does not seem to work at all.
2021-09-03 17:27:48 -04:00
parent b99d228dce
commit 39fb148abd
1 changed files with 6 additions and 0 deletions
@@ -719,8 +719,14 @@ UHCI::SubmitTransfer(Transfer *transfer)
 		return SubmitRequest(transfer);

 	// Process isochronous transfers
+#if 0
 	if (pipe->Type() & USB_OBJECT_ISO_PIPE)
 		return SubmitIsochronous(transfer);
+#else
+	// At present, isochronous transfers cause busylooping, and do not seem to work.
+	if (pipe->Type() & USB_OBJECT_ISO_PIPE)
+		return B_NOT_SUPPORTED;
+#endif

 	uhci_td *firstDescriptor = NULL;
 	uhci_qh *transferQueue = NULL;