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 22F9DC7618B for ; Wed, 15 Mar 2023 10:12:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232338AbjCOKMV (ORCPT ); Wed, 15 Mar 2023 06:12:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45908 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231191AbjCOKL6 (ORCPT ); Wed, 15 Mar 2023 06:11:58 -0400 Received: from mail-wm1-x333.google.com (mail-wm1-x333.google.com [IPv6:2a00:1450:4864:20::333]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F9606F614 for ; Wed, 15 Mar 2023 03:11:31 -0700 (PDT) Received: by mail-wm1-x333.google.com with SMTP id g18so469074wmk.0 for ; Wed, 15 Mar 2023 03:11:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1678875090; h=in-reply-to:from:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to; bh=Auvoy6iuz6AkL1gvWOEZXM/8s8E5R6XALjYVh6HatHU=; b=FKkxQEqnFugOc0SQ/0+ymV16/gaiimazO1DnN13iDd33mF6mI8t8xVKDqgqNGXBZf6 CnDTtuYgZoRq6DTyzJOlQY4D1pHHNFAz30ZlOi5uQdmo4iQM0Lq0ikhJPk7+oBCX2Ukp LSXMBCzPDWbz6UVc/qFYl5SptsJHDEUvBIvfw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678875090; h=in-reply-to:from:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Auvoy6iuz6AkL1gvWOEZXM/8s8E5R6XALjYVh6HatHU=; b=hVGKnMEMTy5jzYi93Pm1wqKIUYMOeEVod5K8F76ENIy/qAUQsrmwlpXzva1KzD2l87 C47YBw1jof0UXcN+suTe4uH9C8y6QPgJmm+/NZ3KL1NZ4E+DHIPf5J1yrSzfDLwYVIJ5 nJUTsYbVPk0AUhvXPTsqONKVmKObK+dgAcSkdWX8SDy7PW3SIF+i5tWe5OGwvMUFv37u voMc0+OUeZO4FLwx4mHszIpvGGDccy7WnRukvKrNpcyBGuSFUVf41DJXOnS7zo6U+PwA KS06UnfTz/Sqzlt9ob++THe0Ocy3G0hJUDwzyGutnvaiubN9l0w9u0D2MkFIjauBu6gu 4dFg== X-Gm-Message-State: AO0yUKUem6KBXljEHpSNiQqW9CId82Zw1T4IgCLYDJLS0KRJ1P33VgTl uLnbwIaVaZDGulTfBUNyIIU8CQ== X-Google-Smtp-Source: AK7set/0lNZVrqqBc3IfVZSva6d+2+HhQqlLzgU9HTmU2CEr593LYnnAQuQWFtxeJUk1Bqh/I9xHvg== X-Received: by 2002:a05:600c:358a:b0:3e1:e149:b67b with SMTP id p10-20020a05600c358a00b003e1e149b67bmr4509126wmq.18.1678875089930; Wed, 15 Mar 2023 03:11:29 -0700 (PDT) Received: from [10.230.42.27] ([192.19.152.250]) by smtp.gmail.com with ESMTPSA id bg7-20020a05600c3c8700b003eb2e33f327sm6191021wmb.2.2023.03.15.03.11.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Mar 2023 03:11:29 -0700 (PDT) Message-ID: Date: Wed, 15 Mar 2023 11:11:28 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.7.2 Subject: Re: wifi breakage due to commit "wifi: brcmfmac: add support for vendor-specific firmware api" To: Johannes Berg , Michael Stapelberg Cc: Kalle Valo , Franky Lin , Pieter-Paul Giesberts , Hante Meuleman , linux-wireless@vger.kernel.org References: <186e23b5668.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com> <186e26dc0a8.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com> <186e4673718.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com> <89262772-7358-77e8-8913-c459819d544a@broadcom.com> From: Arend van Spriel In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000005f776b05f6ed91f6" Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org --0000000000005f776b05f6ed91f6 Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 3/15/2023 10:57 AM, Johannes Berg wrote: > On Wed, 2023-03-15 at 10:12 +0100, Arend van Spriel wrote: >> >> I think it works pretty similar to firmware loading. These days firmware >> loading does not rely on a user-space helper and I assumed the same is >> true for module loading. Will look into it. >> > > As far as I know you still need the modprobe helper in > > /proc/sys/kernel/modprobe Hi Michael, With hint from Johannes I found this Kconfig option: config MODPROBE_PATH string "Path to modprobe binary" default "/sbin/modprobe" help When kernel code requests a module, it does so by calling the "modprobe" userspace utility. This option allows you to set the path where that binary is found. This can be changed at runtime via the sysctl file /proc/sys/kernel/modprobe. Setting this to the empty string removes the kernel's ability to request modules (but userspace can still load modules explicitly). Now checking the .config that you sent it says: CONFIG_MODPROBE_PATH="/sbin/modprobe" So my suspicion is that modprobe is not at that given location? 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