xHCI 1.0: Isoch endpoint CErr field set

xHCI 1.0 specification specifies that CErr does not apply to Isoch endpoints
and shall be set to '0' for Isoch endpoints.
Signed-off-by: NAndiry Xu <andiry.xu@amd.com>
Signed-off-by: NSarah Sharp <sarah.a.sharp@linux.intel.com>

drivers/usb/host/xhci-mem.c

@@ -1190,12 +1190,12 @@ int xhci_endpoint_init(struct xhci_hcd *xhci,
 	/* FIXME dig Mult and streams info out of ep companion desc */
 
 	/* Allow 3 retries for everything but isoc;
-	 * error count = 0 means infinite retries.
+	 * CErr shall be set to 0 for Isoch endpoints.
 	 */
 	if (!usb_endpoint_xfer_isoc(&ep->desc))
 		ep_ctx->ep_info2 = cpu_to_le32(ERROR_COUNT(3));
 	else
-		ep_ctx->ep_info2 = cpu_to_le32(ERROR_COUNT(1));
+		ep_ctx->ep_info2 = cpu_to_le32(ERROR_COUNT(0));
 
 	ep_ctx->ep_info2 |= cpu_to_le32(xhci_get_endpoint_type(udev, ep));