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 24D17CCA490 for ; Mon, 13 Jun 2022 10:31:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346793AbiFMKbH (ORCPT ); Mon, 13 Jun 2022 06:31:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35692 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344997AbiFMK3W (ORCPT ); Mon, 13 Jun 2022 06:29:22 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E9124E021; Mon, 13 Jun 2022 03:20:36 -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 3AEE860AEB; Mon, 13 Jun 2022 10:20:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4CEADC34114; Mon, 13 Jun 2022 10:20:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1655115635; bh=rQEkonLA1YADugnWeYW7KfUtah3MwnizqTX+nl2xgIs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=waLBSBjB6WWl2JsAM/QnuhMbdjUdw2dRtooLXTenbrWk9c72Pd9MHIjX27GBxzMLs YJ3zttu7UnglWC4/kqz1H+VCqmYJCVIfcRwlRGy5JKv66+6y+f/zbJKtEp1aGyAM3H sg5S/4e2e3JUmuVx6Yi1B2Kk/V9tdYp0wNLjC6eM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alan Stern , Evan Green , Sasha Levin Subject: [PATCH 4.9 146/167] USB: hcd-pci: Fully suspend across freeze/thaw cycle Date: Mon, 13 Jun 2022 12:10:20 +0200 Message-Id: <20220613094915.157015694@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220613094840.720778945@linuxfoundation.org> References: <20220613094840.720778945@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: Evan Green [ Upstream commit 63acaa8e9c65dc34dc249440216f8e977f5d2748 ] The documentation for the freeze() method says that it "should quiesce the device so that it doesn't generate IRQs or DMA". The unspoken consequence of not doing this is that MSIs aimed at non-boot CPUs may get fully lost if they're sent during the period where the target CPU is offline. The current callbacks for USB HCD do not fully quiesce interrupts, specifically on XHCI. Change to use the full suspend/resume flow for freeze/thaw to ensure interrupts are fully quiesced. This fixes issues where USB devices fail to thaw during hibernation because XHCI misses its interrupt and cannot recover. Acked-by: Alan Stern Signed-off-by: Evan Green Link: https://lore.kernel.org/r/20220421103751.v3.2.I8226c7fdae88329ef70957b96a39b346c69a914e@changeid Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/core/hcd-pci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c index 7af23b215254..a416eea9a366 100644 --- a/drivers/usb/core/hcd-pci.c +++ b/drivers/usb/core/hcd-pci.c @@ -637,10 +637,10 @@ const struct dev_pm_ops usb_hcd_pci_pm_ops = { .suspend_noirq = hcd_pci_suspend_noirq, .resume_noirq = hcd_pci_resume_noirq, .resume = hcd_pci_resume, - .freeze = check_root_hub_suspended, + .freeze = hcd_pci_suspend, .freeze_noirq = check_root_hub_suspended, .thaw_noirq = NULL, - .thaw = NULL, + .thaw = hcd_pci_resume, .poweroff = hcd_pci_suspend, .poweroff_noirq = hcd_pci_suspend_noirq, .restore_noirq = hcd_pci_resume_noirq, -- 2.35.1