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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FAKE_REPLY_C,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 6AAB3CA9EB5 for ; Mon, 4 Nov 2019 15:58:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3B163214B2 for ; Mon, 4 Nov 2019 15:58:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572883105; bh=65dL2XWYSAggQt+5nA0WasvgqhqiKw9RypmcX0SKzMc=; h=Date:From:To:Cc:Subject:In-Reply-To:List-ID:From; b=YjnlfGhoJeu0bkLOYMobWoUMDvPS4WK8S2sJKQdV7DTWdfIUndn9dpXNM7mzOobdO CZmybbbuCuWWzNySmU1nyc3HMhpjF8ps+PUSv/4AyE9aIPQ2Qzy9YNln9dGQAW7amG HihJU45Cc3quaoOfQQR0G+VBVyD5M+vgLaApazJ4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728957AbfKDP6Y (ORCPT ); Mon, 4 Nov 2019 10:58:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:50314 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727838AbfKDP6Y (ORCPT ); Mon, 4 Nov 2019 10:58:24 -0500 Received: from localhost (unknown [69.71.4.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B1E8620869; Mon, 4 Nov 2019 15:58:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572883104; bh=65dL2XWYSAggQt+5nA0WasvgqhqiKw9RypmcX0SKzMc=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=gRO2STCjtgjhtwkMe17wnUGRHmR0uvILwio/dO8HaQRAKg9p7DX8sRsgn6ipm7L5w 3/lZ56cvhkJsujOBZRhx6bD2C13D8ptSWX/eCxSRz7oiwYL8OAMIWIK/77pe4kEmex U6QSGogqcU0q+cIEnv0Gfx7vBMhY/O3AIYdZRqRI= Date: Mon, 4 Nov 2019 09:58:22 -0600 From: Bjorn Helgaas To: Carlo Pisani Cc: linux-pci@vger.kernel.org Subject: Re: Oxford Semiconductor Ltd OX16PCI954 - weird dmesg Message-ID: <20191104155822.GA106911@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org [+cc linux-pci (please keep the list copied so others can contribute/benefit and it's searchable via list archives)] On Mon, Nov 04, 2019 at 04:25:02PM +0100, Carlo Pisani wrote: > > I think the first step is to fix the problem that prevents current > > kernels from booting. It's not really practical to debug v4.4. > > does anyone have a modern kernel working for rb532? > because I suspect Linux is in regressing regarding this point. I have no idea what rb532 is or whether Linux is regressing on it. Any platform that isn't tested occasionally does tend to regress over time. > > It sounds like the firmware fails to even load v4.11? If that's the > > case, it's probably not a problem with the kernel itself, since it > > hasn't even started executing. Possibly a kernel size problem? Maybe > > the v4.11 kernel is larger than v4.4, v4.9, etc? Does v4.11 boot if > > you strip out non-essential drivers? > > I do not know, and I don't understand. The rb532 manual doesn't say a > word regarding the maximal size of the kernel, which in our case is > less than 8Mbyte Is the v4.11 kernel image bigger than the v4.4 kernel that boots? > We tried to strip extra functions out of the kernel v5.*, but no dice > > hence, first we need to fix kernel 4.4 which boots and work, then we > can try to understand what is wrong with kernel v5.* > > our time is limited, and we have to complete a project rather than > play with the kernel Sorry, I should have been more clear. I don't think it's practical *for me* to debug something on v4.4. It may well be practical for you because you have different constraints than I do. Bjorn