diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 6cb9c2235a0bfda07190232475548e8090be414b..1db3c2794a49ae37e36bb0e9aa93394be0a68593 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -3138,6 +3138,12 @@ int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, xhci_dbg(xhci, "Driver wants %u stream IDs (including stream 0).\n", num_streams); + /* MaxPSASize value 0 (2 streams) means streams are not supported */ + if (HCC_MAX_PSA(xhci->hcc_params) < 4) { + xhci_dbg(xhci, "xHCI controller does not support streams.\n"); + return -ENOSYS; + } + config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); if (!config_cmd) { xhci_dbg(xhci, "Could not allocate xHCI command structure.\n");