From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE5DEC433FE for ; Wed, 4 May 2022 16:57:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351286AbiEDRAl (ORCPT ); Wed, 4 May 2022 13:00:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353948AbiEDQyk (ORCPT ); Wed, 4 May 2022 12:54:40 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E6FD349904; Wed, 4 May 2022 09:49:44 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 34748617A5; Wed, 4 May 2022 16:49:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 81362C385A5; Wed, 4 May 2022 16:49:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1651682983; bh=k1rHxpQm2S8mpKlnDFvQd5CLu7baZrkGv8q8lii6SQc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0m1vj5hbi5ViNYOBR4qnc8uX8AykAsu2mn7g8kU1OrlteXFObaEcoWrO2cWoykF7e cpvIE5LBRRFhXaumOedZ3mLefNq08nWSJDL3ByKss2PP/df8Ieas5vW8HbQP8uK2KB 7rX84UWg4kZke2tZRQ3B24Z5ZyadrFsmofFG8t4w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mathias Nyman Subject: [PATCH 5.10 012/129] xhci: increase usb U3 -> U0 link resume timeout from 100ms to 500ms Date: Wed, 4 May 2022 18:43:24 +0200 Message-Id: <20220504153022.295406273@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220504153021.299025455@linuxfoundation.org> References: <20220504153021.299025455@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mathias Nyman commit 33597f0c48be0836854d43c577e35c8f8a765a7d upstream. The first U3 wake signal by the host may be lost if the USB 3 connection is tunneled over USB4, with a runtime suspended USB4 host, and firmware implemented connection manager. Specs state the host must wait 100ms (tU3WakeupRetryDelay) before resending a U3 wake signal if device doesn't respond, leading to U3 -> U0 link transition times around 270ms in the tunneled case. Fixes: 0200b9f790b0 ("xhci: Wait until link state trainsits to U0 after setting USB_SS_PORT_LS_U0") Cc: stable@vger.kernel.org Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20220408134823.2527272-4-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-hub.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -1348,7 +1348,7 @@ int xhci_hub_control(struct usb_hcd *hcd } spin_unlock_irqrestore(&xhci->lock, flags); if (!wait_for_completion_timeout(&bus_state->u3exit_done[wIndex], - msecs_to_jiffies(100))) + msecs_to_jiffies(500))) xhci_dbg(xhci, "missing U0 port change event for port %d-%d\n", hcd->self.busnum, wIndex + 1); spin_lock_irqsave(&xhci->lock, flags);