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 87199C433F5 for ; Mon, 4 Oct 2021 07:20:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5C33A610C9 for ; Mon, 4 Oct 2021 07:20:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229484AbhJDHWd (ORCPT ); Mon, 4 Oct 2021 03:22:33 -0400 Received: from mail.kernel.org ([198.145.29.99]:47184 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229478AbhJDHWd (ORCPT ); Mon, 4 Oct 2021 03:22:33 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0D8CC610FB; Mon, 4 Oct 2021 07:20:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1633332045; bh=ON9CK3XRzMqoI/ij0MYu2d0w6sGiAjn9TWL7zrg3BUs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=VHXEjC0/qIziU+y3wvcqO+udrRv91NeTU4mJgPvM0jCUw9CDfF8IA/D5AC8dlQf1Y OMVCeEKh+GnfoNdncvr/puPgqZVjv3F5uLMTyBcWmRnFfU7rQLMoq4T7g387+9P8YH VWOw/Tmnk/NktAtiRei39De6w/jGsKeNZKZhwPYPksy4hEb+nGAKJ2m849xaeB+qsR 5H1+m6HeYN8J/14NhcvS0zxdaOxAPIsucE4xo4gyQJb97S9fv4ymZKoWw1DCAA2UXN DUgTDsBTfST5+vvuDU3TA5n2Syn41V/qYu46YLOElQ383iiKRVy5pBN7oTI5eGy7H5 Aa2BqrI2eRQ1w== Date: Mon, 4 Oct 2021 15:20:39 +0800 From: Peter Chen To: Greg KH 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: <20211004072039.GB27151@Peter> 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: Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On 21-10-04 09:11:36, Greg KH wrote: > 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? Yes, please do that way, thanks. -- Thanks, Peter Chen