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 D0A41C433EF for ; Fri, 25 Feb 2022 18:39:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231607AbiBYSkW (ORCPT ); Fri, 25 Feb 2022 13:40:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59130 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229536AbiBYSkV (ORCPT ); Fri, 25 Feb 2022 13:40:21 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00AEC574A6; Fri, 25 Feb 2022 10:39:48 -0800 (PST) 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 ams.source.kernel.org (Postfix) with ESMTPS id ABA94B832FA; Fri, 25 Feb 2022 18:39:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EC549C340F0; Fri, 25 Feb 2022 18:39:45 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="X9kxt8h6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1645814382; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=+cZM3tqH37OBLiFp4YPPctLuuNx//1CKHc+R0z71lXU=; b=X9kxt8h6M/ruDEvHoKIrLMPZHo2yO+8XbfCZot2KHwQSz3jBaCTSDDRP30ZJxqoh1UAwPa 8ZsbMQeX/LGOloNSv2d7UJBc7mXroeO2etgi/gThKzDdxGZIFcUkkZkxjmRMXHIsxmsAgY 3mDOXIPgFWmuQVcX5ks83H59j7Vj2F8= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id 49ea77f8 (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO); Fri, 25 Feb 2022 18:39:42 +0000 (UTC) Received: by mail-yw1-f169.google.com with SMTP id 00721157ae682-2d07ae0b1c4so43045647b3.11; Fri, 25 Feb 2022 10:39:42 -0800 (PST) X-Gm-Message-State: AOAM530T3fv6O3kShRZiwXJQ7DAmFDLZiloj42psqBH4nS0dcW2L2C6T oyOe2A7fdpgTJUBZyPxoO1FhovQ3jgRbmersjEo= X-Google-Smtp-Source: ABdhPJwFlF7UGnzxZAQpX2LSJVz56JLxOKSWAm7gYadFtCOkE+toxm4/dkfAkSqVwqeqMjm//9pGVySRm25S2PhhFcI= X-Received: by 2002:a0d:e005:0:b0:2d7:fb79:8f36 with SMTP id j5-20020a0de005000000b002d7fb798f36mr9557404ywe.404.1645814381161; Fri, 25 Feb 2022 10:39:41 -0800 (PST) MIME-Version: 1.0 References: <20220225155552.30636-1-graf@amazon.com> In-Reply-To: From: "Jason A. Donenfeld" Date: Fri, 25 Feb 2022 19:39:30 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH] ACPI: bus: Match first 9 bytes of device IDs To: Ard Biesheuvel , Alexander Graf Cc: ACPI Devel Maling List , Linux Kernel Mailing List , Len Brown , "Rafael J. Wysocki" , Greg KH , "Woodhouse, David" Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Okay, the final piece, userspace: /sys/bus/acpi/devices/QEMUVGID:00/modalias gives: acpi:QEMUVGID:VM_GEN_COUNTER: modinfo -F alias vmgenid.ko gives: acpi*:VM_GEN_COUNTER:* udev src uses fnmatch. Bash confirms a match: $ [[ "acpi:QEMUVGID:VM_GEN_COUNTER:" == acpi*:VM_GEN_COUNTER:* ]] && echo matches matches So I think with ACPI_ID_LEN --> 16 we are good to go. Jason