From: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 6cb9c2235a0b..1db3c2794a49 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");
--
1.8.5.5
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