From patchwork Tue Sep 1 15:11:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 264667 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A24ECC433E6 for ; Tue, 1 Sep 2020 15:56:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 822C7206EB for ; Tue, 1 Sep 2020 15:56:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598975815; bh=h20gwhi+ec5+XhdOH3pXAyexGBcuS6qPY0q8ACdgBgo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tuS8IqcrcgeJlTTRKsUWldwLvoPujy+K4ldNsis1+jBATCH02eRTumzDU3V7ic5kV nvR6c8U7EvPWNqYPFV4cgEWLojJHesgP+6SYQoeQWUlVXlLtcl4sNwW+WpB1FdHkzR fCsDuvwROJUP1k171TW7sp58HABzB2NA+q52dBcE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731222AbgIAP4f (ORCPT ); Tue, 1 Sep 2020 11:56:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:60698 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731839AbgIAPou (ORCPT ); Tue, 1 Sep 2020 11:44:50 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7EC46206EB; Tue, 1 Sep 2020 15:44:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598975089; bh=h20gwhi+ec5+XhdOH3pXAyexGBcuS6qPY0q8ACdgBgo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X9mdfTFREPMsr9/3eLMJ7i37gisPGYpr5y93x0PHHG5K0OgnYI0Koiw4S57qEiANI mJnjD0K2uzBz8TsNN1adn5tIrS+yLfPX3mWVT1w7HP/cH3aFVSnAilXRoKQKRKHG1C UlRkMe/Nhf3qrXEFzXJur4/CuIhsATR5jG6Mwh6w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "M. Vefa Bicakci" , Valentina Manea , Alan Stern , Bastien Nocera , Shuah Khan Subject: [PATCH 5.8 205/255] usbip: Implement a match function to fix usbip Date: Tue, 1 Sep 2020 17:11:01 +0200 Message-Id: <20200901151010.524599037@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901151000.800754757@linuxfoundation.org> References: <20200901151000.800754757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: M. Vefa Bicakci commit 7a2f2974f26542b4e7b9b4321edb3cbbf3eeb91a upstream. Commit 88b7381a939d ("USB: Select better matching USB drivers when available") introduced the use of a "match" function to select a non-generic/better driver for a particular USB device. This unfortunately breaks the operation of usbip in general, as reported in the kernel bugzilla with bug 208267 (linked below). Upon inspecting the aforementioned commit, one can observe that the original code in the usb_device_match function used to return 1 unconditionally, but the aforementioned commit makes the usb_device_match function use identifier tables and "match" virtual functions, if either of them are available. Hence, this commit implements a match function for usbip that unconditionally returns true to ensure that usbip is functional again. This change has been verified to restore usbip functionality, with a v5.7.y kernel on an up-to-date version of Qubes OS 4.0, which uses usbip to redirect USB devices between VMs. Thanks to Jonathan Dieter for the effort in bisecting this issue down to the aforementioned commit. Fixes: 88b7381a939d ("USB: Select better matching USB drivers when available") Link: https://bugzilla.kernel.org/show_bug.cgi?id=208267 Link: https://bugzilla.redhat.com/show_bug.cgi?id=1856443 Link: https://github.com/QubesOS/qubes-issues/issues/5905 Signed-off-by: M. Vefa Bicakci Cc: # 5.7 Cc: Valentina Manea Cc: Alan Stern Reviewed-by: Bastien Nocera Reviewed-by: Shuah Khan Link: https://lore.kernel.org/r/20200810160017.46002-1-m.v.b@runbox.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/usbip/stub_dev.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/usb/usbip/stub_dev.c +++ b/drivers/usb/usbip/stub_dev.c @@ -461,6 +461,11 @@ static void stub_disconnect(struct usb_d return; } +static bool usbip_match(struct usb_device *udev) +{ + return true; +} + #ifdef CONFIG_PM /* These functions need usb_port_suspend and usb_port_resume, @@ -486,6 +491,7 @@ struct usb_device_driver stub_driver = { .name = "usbip-host", .probe = stub_probe, .disconnect = stub_disconnect, + .match = usbip_match, #ifdef CONFIG_PM .suspend = stub_suspend, .resume = stub_resume,