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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 011D7C5B56A for ; Wed, 12 Aug 2026 12:00:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=rSXPrV3eFSDWfkyUz9K6iQGQB3o1Fl+JeCIISPA+xtk=; b=EYX4/fkU2njnZ4 zaew0bQR75XZdTHMmem1xvp/dZJZ/Fern2YPmeUC2jj1kab0+slkH1nDtvYmQgwts0pVerP/h3Ly5 12p1atOrHMx0IaQIIjFOAH1c5mtcmqyeSOmGa70Ym4/gcLtrLpLA3Nh/x/AL9fEQRaM7MiknOYta4 eKq+Cg/CzELe7AiK30jZSZOBzpDmwFz4ipNBkDXjcYI1HvwjCj5PZQtbXsujXZG5/EH8EcqVOwc3p X929Q1zeWEiBLlTManl6nUNf/uNBGXjullm8MuBPOMzbknkecVHvP8RfB01wFuHTu6PLR7zHQ2IMq KO4Jg3exN0TQXIsBbhYA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wu7d1-0000000G93R-2lzR; Wed, 12 Aug 2026 12:00:15 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wu7d0-0000000G93J-0bXw for linux-amlogic@lists.infradead.org; Wed, 12 Aug 2026 12:00:14 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 656D560A92; Wed, 12 Aug 2026 12:00:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 63D301F00A3A; Wed, 12 Aug 2026 12:00:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786536012; bh=MHNBwGGnswWSzAP7z65dBZa8AALtkmk2EGpH/Ujybd0=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=ic/w6eGgJIqhYWfLKdXfmz98qSzg6rfB+ir7Atcv+jNiJY7/P3MdEASn2QvwjA1Xv vKVSxqD2rofrap+9PVJs3t6FawtfXhajZu18cktJ+eZTRkEUvrgxPwPfXewolHSu29 ABfJrEv73jwoTYX2qs64v2L9KQYbFGv2ZP7z9Zk5cVUR9HpYfT0/I0iRwvGNMTpe/M N//WCw/7H/yv0R0W6ZPIOMZXp8zgeGl42b4vpD9RgRI+YiyHym4yxzIHEdiPiyJwm2 z/SyrZlj9BtRrrqx1k06RxOVOt3y7sYa/Z4Cu/wjKJIqM8z5D3O1ToBZce0y9lDuyd fLarLCf72R20g== Date: Wed, 12 Aug 2026 13:00:07 +0100 From: Lee Jones To: sashiko-reviews@lists.linux.dev Cc: Ronald Claveau , neil.armstrong@linaro.org, linux-amlogic@lists.infradead.org, mfd@lists.linux.dev, conor+dt@kernel.org, robh@kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH v9 3/6] mfd: khadas-mcu: Add support for VIM4 MCU variant Message-ID: <20260812120007.GO1072730@google.com> References: <20260805-add-mcu-fan-khadas-vim4-v9-0-75df78710b9e@aliel.fr> <20260805-add-mcu-fan-khadas-vim4-v9-3-75df78710b9e@aliel.fr> <20260805081913.272991F00A3A@smtp.kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260805081913.272991F00A3A@smtp.kernel.org> X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org On Wed, 05 Aug 2026, sashiko-bot@kernel.org wrote: > Thank you for your contribution! Sashiko AI review found 1 potential issu= e(s) to consider: > - [High] The driver unconditionally fails to probe on generic Khadas MCU = boards (VIM1/VIM2/VIM3) due to a NULL pointer check on valid match data. Please review, explain or fix the Sashiko review(s). If this is a set, this request includes the other patches too. > -- > = > --- Patch [3]: [PATCH v9 3/6] mfd: khadas-mcu: Add support for VIM4 MCU v= ariant --- > commit eab418dac1b5e94bd297b0a14e92e87b2063dc9b > Author: Ronald Claveau > = > mfd: khadas-mcu: Add support for VIM4 MCU variant > = > This patch refactors the probe function to use per-variant values instead= of > hardcoded globals. It adds dedicated regmap configuration, fan control re= gister, > and duty-cycle levels for the VIM4 MCU variant. A new compatible string > "khadas,vim4-mcu" is introduced for this new device. > = > > diff --git a/drivers/mfd/khadas-mcu.c b/drivers/mfd/khadas-mcu.c > > index 0e74efe14f367..4cb305ac915e1 100644 > > --- a/drivers/mfd/khadas-mcu.c > > +++ b/drivers/mfd/khadas-mcu.c > [ ... ] > > @@ -75,47 +75,138 @@ static const struct regmap_config khadas_mcu_regma= p_config =3D { > [ ... ] > > static int khadas_mcu_probe(struct i2c_client *client) > > { > > + const struct mfd_cell *cells, *fan_cells; > > + const struct regmap_config *regmap_cfg; > > struct device *dev =3D &client->dev; > > + int ncells, nfan_cells, ret; > > struct khadas_mcu *ddata; > > - int ret; > > + const void *match; > > = > > ddata =3D devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); > > if (!ddata) > > return -ENOMEM; > > = > > + match =3D i2c_get_match_data(client); > > + if (!match) > > + return -ENODEV; > = > [Severity: High] > Does this code inadvertently break the probe for generic Khadas MCU boards > (VIM1/VIM2/VIM3)? > = > Because KHADAS_MCU_GENERIC evaluates to 0 in its enum, i2c_get_match_data= () will > return a NULL pointer when matching "khadas,mcu" in khadas_mcu_probe() in > drivers/mfd/khadas-mcu.c. This will cause the check here to evaluate to t= rue and > unconditionally abort the probe with -ENODEV. > = > [ ... ] > > @@ -123,7 +214,8 @@ static int khadas_mcu_probe(struct i2c_client *clie= nt) > > = > > #ifdef CONFIG_OF > > static const struct of_device_id khadas_mcu_of_match[] =3D { > > - { .compatible =3D "khadas,mcu", }, > > + { .compatible =3D "khadas,mcu", .data =3D (void *)KHADAS_MCU_GENERIC = }, > > + { .compatible =3D "khadas,vim4-mcu", .data =3D (void *)KHADAS_MCU_VIM= 4 }, > > {}, > > }; > > MODULE_DEVICE_TABLE(of, khadas_mcu_of_match); > = > -- = > Sashiko AI review =B7 https://sashiko.dev/#/patchset/20260805-add-mcu-fan= -khadas-vim4-v9-0-75df78710b9e@aliel.fr?part=3D3 -- = Lee Jones _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic