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 X-Spam-Level: X-Spam-Status: No, score=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 65C6EC433DF for ; Tue, 9 Jun 2020 12:01:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 37B8B2078C for ; Tue, 9 Jun 2020 12:01:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="TpD8O7gU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729219AbgFIMB0 (ORCPT ); Tue, 9 Jun 2020 08:01:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727903AbgFIMBX (ORCPT ); Tue, 9 Jun 2020 08:01:23 -0400 Received: from mail-wr1-x441.google.com (mail-wr1-x441.google.com [IPv6:2a00:1450:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1AA8C05BD1E for ; Tue, 9 Jun 2020 05:01:22 -0700 (PDT) Received: by mail-wr1-x441.google.com with SMTP id j10so20989757wrw.8 for ; Tue, 09 Jun 2020 05:01:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:autocrypt:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=MVpJuiC3RrQ8+gucd3VH4JYrNdHZIlwvK5NMkSBKU38=; b=TpD8O7gUFAvhy+he7qzcMct+X/lUjtSBra1AuvbHSyB2Bj9VrJtIpymMQ8iUuyEvK/ iMXUqDDux4OqDsuw3ujulq+/9Tlbz5QwBOfbAzz9ZE4r+hc2D8pJuDV0nWXeDmCBNZWI 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ABdhPJw5/hDu5+yYjIOCqDyz4Lgn0ZoVAYH1K0NGtBn+kisYmaeD9CAs1jjK9VgdvR21EVn5i9BaEw== X-Received: by 2002:adf:a491:: with SMTP id g17mr4311121wrb.132.1591704081382; Tue, 09 Jun 2020 05:01:21 -0700 (PDT) Received: from ziggy.stardust ([213.195.114.138]) by smtp.gmail.com with ESMTPSA id l1sm3443763wrb.31.2020.06.09.05.01.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 09 Jun 2020 05:01:20 -0700 (PDT) Subject: Re: [PATCH] mfd: mt6360: Fix register driver NULL pointer by add driver name To: Gene Chen , Lee Jones Cc: linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, Gene Chen , Wilma.Wu@mediatek.com, shufan_lee@richtek.com, cy_huang@richtek.com References: <1591609125-3761-1-git-send-email-gene.chen.richtek@gmail.com> <20200608192829.GG4106@dell> From: Matthias Brugger Autocrypt: addr=matthias.bgg@gmail.com; prefer-encrypt=mutual; keydata= mQINBFP1zgUBEAC21D6hk7//0kOmsUrE3eZ55kjc9DmFPKIz6l4NggqwQjBNRHIMh04BbCMY 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XUSrUUTRimTkuMHrTYaHY3544a+GduQQLLA+avseLmjvKHxsU4zna0p0Yb4czwoJj+wSkVGQ NMDbxcY26CMPK204jhRm9RG687qq6691hbiuAtWABeAsl1AS+mdS7aP/4uOM4kFCvXYgIHxP /BoVz9CZTMEVAZVzbRKyYCLUf1wLhcHzugTiONz9fWMBLLskKvq7m1tlr61mNgY9nVwwClMU uE7i1H9r/2/UXLd+pY82zcXhFrfmKuCDmOkB5xPsOMVQJH8I0/lbqfLAqfsxSb/X1VKaP243 jzi+DzD9cvj2K6eD5j5kcKJJQactXqfJvF1Eb+OnxlB1BCLE8D1rNkPO5O742Mq3MgDmq19l +abzEL6QDAAxn9md8KwrA3RtucNh87cHlDXfUBKa7SRvBjTczDg+HEPNk2u3hrz1j3l2rliQ y1UfYx7Vk/TrdwUIJgKS8QAr8Lw9WuvY2hSqL9vEjx8VAkPWNWPwrQ== Message-ID: <1db40ad0-faf4-2a4a-8514-fed59d5053f7@gmail.com> Date: Tue, 9 Jun 2020 14:01:19 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/06/2020 13:43, Gene Chen wrote: > Lee Jones 於 2020年6月9日 週二 上午3:28寫道： >> >> On Mon, 08 Jun 2020, Gene Chen wrote: >> >>> From: Gene Chen >>> >>> accidentally remove driver name when >>> replace probe by probe_new in add mt6360 mfd driver patch v4 >>> >>> [ 121.243012] EAX: c2a8bc64 EBX: 00000000 ECX: 00000000 EDX: 00000000 >>> [ 121.243012] ESI: c2a8bc79 EDI: 00000000 EBP: e54bdea8 ESP: e54bdea0 >>> [ 121.243012] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010286 >>> [ 121.243012] CR0: 80050033 CR2: 00000000 CR3: 02ec3000 CR4: 000006b0 >>> [ 121.243012] Call Trace: >>> [ 121.243012] kset_find_obj+0x3d/0xc0 >>> [ 121.243012] driver_find+0x16/0x40 >>> [ 121.243012] driver_register+0x49/0x100 >>> [ 121.243012] ? i2c_for_each_dev+0x39/0x50 >>> [ 121.243012] ? __process_new_adapter+0x20/0x20 >>> [ 121.243012] ? cht_wc_driver_init+0x11/0x11 >>> [ 121.243012] i2c_register_driver+0x30/0x80 >>> [ 121.243012] ? intel_lpss_pci_driver_init+0x16/0x16 >>> [ 121.243012] mt6360_pmu_driver_init+0xf/0x11 >>> [ 121.243012] do_one_initcall+0x33/0x1a0 >>> [ 121.243012] ? parse_args+0x1eb/0x3d0 >>> [ 121.243012] ? __might_sleep+0x31/0x90 >>> [ 121.243012] ? kernel_init_freeable+0x10a/0x17f >>> [ 121.243012] kernel_init_freeable+0x12c/0x17f >>> [ 121.243012] ? rest_init+0x110/0x110 >>> [ 121.243012] kernel_init+0xb/0x100 >>> [ 121.243012] ? schedule_tail_wrapper+0x9/0xc >>> [ 121.243012] ret_from_fork+0x19/0x24 >>> [ 121.243012] Modules linked in: >>> [ 121.243012] CR2: 0000000000000000 >>> [ 121.243012] random: get_random_bytes called from init_oops_id+0x3a/0x40 with crng_init=0 >>> [ 121.243012] ---[ end trace 38a803400f1a2bee ]--- >>> [ 121.243012] EIP: strcmp+0x11/0x30 >> >> How did this driver ever work for you? >> > > i ask my coworker help me verify. > i will check the patch myself, sincerely apologies for this. > BTW for which SoC this PMIC is used for? Maybe it would be useful to have some development HW to be able to verify patches. Regards, Matthias