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 DE624D35666 for ; Wed, 28 Jan 2026 02:10:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To: Content-Transfer-Encoding:Content-Type: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=bdoC2fTunlOvb6SZtjaRuiCE5BmTWgXqtdP4TLLUTo8=; b=I8bj5c5K8uQPjyjRc8WiS+wgo6 dCQxHx/LkaCb3Sgxy3lPWc+SjkzJfWknQMwBtZz8o0n73ecNzNPQ2b0mgoWAs3ivAJtuhHGOlrd0Z Pe2AWDY4jNQpnHMz4PhLBlBOfAKa5sGbUon0+FzXoSnFx1JI3zsiZ/jz8y3R1i853+Vy1mgu227uM l6UX57HOiCfhxeS/kwsxtS95M7gwatFQPq/VVMghTr0dlUO+TaJoT4pyvMJPatVeVBCGq42Xn4WVR WxG53t43FzeDsyRerDFNSz5cgdxzs3MrGj1900f1D9VnoF7tH7ssmL8E4ANanpmJyRTNQrwKpwRuD 8aZDahYQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vkv0Q-0000000FI8s-2PQ2; Wed, 28 Jan 2026 02:10:06 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vkv0M-0000000FI7O-1k45 for linux-arm-kernel@lists.infradead.org; Wed, 28 Jan 2026 02:10:03 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id A1552402BC; Wed, 28 Jan 2026 02:10:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 66A27C116C6; Wed, 28 Jan 2026 02:10:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769566201; bh=c02Qz508Y2Kp0ercGgCth0mlpDxAua9YE3mNF8P84iE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=s39sgDpCJxAQVaNB6ctusy7+cRhKyyceDPVc3dVlv5yYt/w/BDtw6PWve3PEOs1Et atHQmgK8rdyQU2nuP5MjaNvQhlZakW6d36ZDsNkaL79rrFsxxmt6gLJktJoXfRlrqV yxZDfXJ1YO0w2Lbss2gU/ATO0e8NbzB0CqAR5CrlcNuQ6DvDk10E/uyD9IR0c7mZs+ kc6rmeHRvb24kVENij4iqKbMjiG27HP/8Z7sBaIKbRfnGpNuRExb2jgX5e4FzPAp5N hekA7h0nkVa0cNq+OWUv2EEynHBU9X5EN+W8noLb1bsPcqsggxiSwBIzZ320rAqCWS mnR2AlQzR6ZLQ== Date: Tue, 27 Jan 2026 20:10:00 -0600 From: Rob Herring To: Alexander Wilhelm , Laurentiu Tudor , Li Yang Cc: Shawn Guo , Krzysztof Kozlowski , Conor Dooley , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: USB error on LS1046 platform Message-ID: <20260128021000.GA3716747-robh@kernel.org> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260127_181002_567476_9585E6BC X-CRM114-Status: GOOD ( 18.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org +Laurentiu, Li On Tue, Jan 27, 2026 at 09:21:38AM +0100, Alexander Wilhelm wrote: > Hello developers, > > I’m using an NXP LS1046A SoC with the integrated DWC3 USB controller in > host mode. On Linux v5.5.167 my USB flash drive was detected and mountable. > After upgrading to Linux v6.6.110 the USB flash drive is no longer > recognized. If it is already plugged in during boot phase I get the > following errors: > > xhci-hcd xhci-hcd.2.auto: Error while assigning device slot ID: Command Aborted > xhci-hcd xhci-hcd.2.auto: Max number of devices this xHCI host supports is 127 > > I have narrowed the issue down to the following commit: > > 136975c33894e7b48a6007af0f4c25f423bbd1de > arm64: dts: ls1046a: make dma-coherent global to the SoC It's best to send this to the author(s) of the commit. Looks like it needs to be reverted or USB marked non-coherent. That's Shawn's responsibility to apply and the author to send a fix (unless you want to). The DT maintainers don't take .dts patches. > > When I revert this commit, USB works perfectly on my system. > > I have already asked on the `linux-usb` mailing list > (https://lore.kernel.org/linux-usb/aTFr17xKxnWGG3vU@FUE-ALEWI-WINX/) and also > forwarded the message to `linux-arm-kernel`, but I haven’t received any replies > so far. Has anyone encountered this problem on the LS1046 or a similar platform? > Any hints or experiences would be greatly appreciated. > > > Best regards > Alexander Wilhelm