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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 98F1FC28CC5 for ; Thu, 6 Jun 2019 00:56:38 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1C90E2070B for ; Thu, 6 Jun 2019 00:56:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1C90E2070B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 45K6g75WW5zDqgH for ; Thu, 6 Jun 2019 10:56:35 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=permerror (mailfrom) smtp.mailfrom=kernel.crashing.org (client-ip=63.228.1.57; helo=gate.crashing.org; envelope-from=benh@kernel.crashing.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 45K6dR4fhgzDqbc for ; Thu, 6 Jun 2019 10:55:07 +1000 (AEST) Received: from localhost (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id x560spOn002708; Wed, 5 Jun 2019 19:54:53 -0500 Message-ID: Subject: Re: [BISECTED REGRESSION] b43legacy broken on G4 PowerBook From: Benjamin Herrenschmidt To: Aaro Koskinen , Christoph Hellwig , Christian Zigotzky , Michael Ellerman , Larry Finger Date: Thu, 06 Jun 2019 10:54:51 +1000 In-Reply-To: <20190605225059.GA9953@darkstar.musicnaut.iki.fi> References: <20190605225059.GA9953@darkstar.musicnaut.iki.fi> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-wireless@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Thu, 2019-06-06 at 01:50 +0300, Aaro Koskinen wrote: > Hi, > > When upgrading from v5.0 -> v5.1 on G4 PowerBook, I noticed WLAN does > not work anymore: > > [ 42.004303] b43legacy-phy0: Loading firmware version 0x127, patch level 14 (2005-04-18 02:36:27) > [ 42.184837] b43legacy-phy0 debug: Chip initialized > [ 42.184873] b43legacy-phy0 ERROR: The machine/kernel does not support the required 30-bit DMA mask > > The same happens with the current mainline. How much RAM do you have ? Ben. > > Bisected to: > > commit 65a21b71f948406201e4f62e41f06513350ca390 > Author: Christoph Hellwig > Date: Wed Feb 13 08:01:26 2019 +0100 > > powerpc/dma: remove dma_nommu_dma_supported > > This function is largely identical to the generic version used > everywhere else. Replace it with the generic version. > > Signed-off-by: Christoph Hellwig > Tested-by: Christian Zigotzky > Signed-off-by: Michael Ellerman > > A.