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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8EBEAC433FE for ; Mon, 4 Oct 2021 07:11:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 73A61611AE for ; Mon, 4 Oct 2021 07:11:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229804AbhJDHN2 (ORCPT ); Mon, 4 Oct 2021 03:13:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:43290 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229655AbhJDHN1 (ORCPT ); Mon, 4 Oct 2021 03:13:27 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 90C8A610A3; Mon, 4 Oct 2021 07:11:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1633331499; bh=Xg3M1xWow3IorX7y4LvDezkQFxY7KbSXRcwXRN+nMu4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gFtyNHI5FNphmKmb6BfJ+g6aoNgqwPomHkdZd6aL4gztWP9NNNBNEKtXZWxc7eudi KZSZ0NWTK5x6x7dkFRhQQ6RtgkcKeNJdPTFiHPXeqWS2gS5KrTO1/Si608njNRYj/C UkwOqsJlIStAHIOmlIb+gO5ek458LMClSM4Do4Ik= Date: Mon, 4 Oct 2021 09:11:36 +0200 From: Greg KH To: Peter Chen Cc: Frieder Schrempf , Fabio Estevam , shawnguo@kernel.org, marex@denx.de, linux-usb@vger.kernel.org, heiko.thiery@gmail.com, stable@vger.kernel.org Subject: Re: [PATCH v3] usb: chipidea: ci_hdrc_imx: Also search for 'phys' phandle Message-ID: References: <20210921113754.767631-1-festevam@gmail.com> <7f3b82ad-ff12-ce23-12a3-25b09c767759@kontron.de> <20211004065142.GA27151@Peter> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211004065142.GA27151@Peter> Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On Mon, Oct 04, 2021 at 02:51:42PM +0800, Peter Chen wrote: > On 21-09-30 16:36:51, Frieder Schrempf wrote: > > On 21.09.21 13:37, Fabio Estevam wrote: > > > When passing 'phys' in the devicetree to describe the USB PHY phandle > > > (which is the recommended way according to > > > Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt) the > > > following NULL pointer dereference is observed on i.MX7 and i.MX8MM: > > > > > > [ 1.489344] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098 > > > [ 1.498170] Mem abort info: > > > [ 1.500966] ESR = 0x96000044 > > > [ 1.504030] EC = 0x25: DABT (current EL), IL = 32 bits > > > [ 1.509356] SET = 0, FnV = 0 > > > [ 1.512416] EA = 0, S1PTW = 0 > > > [ 1.515569] FSC = 0x04: level 0 translation fault > > > [ 1.520458] Data abort info: > > > [ 1.523349] ISV = 0, ISS = 0x00000044 > > > [ 1.527196] CM = 0, WnR = 1 > > > [ 1.530176] [0000000000000098] user address but active_mm is swapper > > > [ 1.536544] Internal error: Oops: 96000044 [#1] PREEMPT SMP > > > [ 1.542125] Modules linked in: > > > [ 1.545190] CPU: 3 PID: 7 Comm: kworker/u8:0 Not tainted 5.14.0-dirty #3 > > > [ 1.551901] Hardware name: Kontron i.MX8MM N801X S (DT) > > > [ 1.557133] Workqueue: events_unbound deferred_probe_work_func > > > [ 1.562984] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--) > > > [ 1.568998] pc : imx7d_charger_detection+0x3f0/0x510 > > > [ 1.573973] lr : imx7d_charger_detection+0x22c/0x510 > > > > > > This happens because the charger functions check for the phy presence > > > inside the imx_usbmisc_data structure (data->usb_phy), but the chipidea > > > core populates the usb_phy passed via 'phys' inside 'struct ci_hdrc' > > > (ci->usb_phy) instead. > > > > > > This causes the NULL pointer dereference inside imx7d_charger_detection(). > > > > > > Fix it by also searching for 'phys' in case 'fsl,usbphy' is not found. > > > > > > Tested on a imx7s-warp board. > > > > > > Cc: stable@vger.kernel.org > > > Fixes: 746f316b753a ("usb: chipidea: introduce imx7d USB charger detection") > > > Reported-by: Heiko Thiery > > > Signed-off-by: Fabio Estevam > > > Reviewed-by: Frieder Schrempf > > > > Tested-by: Frieder Schrempf > > Acked-by: Peter Chen > > Greg, would you please help apply it? Sure. But I have usually been ignoring chipidea patches and hoping you would pick them up and forward them on to me. Should I no longer do that and just wait for an ack from you? That's fine with me, I've been doing it with gadget patches for a while now. thanks, greg k-h