[{"id":3688678,"web_url":"http://patchwork.ozlabs.org/comment/3688678/","msgid":"","list_archive_url":null,"date":"2026-05-08T18:47:45","subject":"Re: [PATCH 1/3] core: Skip parent device nodes without a DT reference\n when looking for dma-ranges","submitter":{"id":6170,"url":"http://patchwork.ozlabs.org/api/people/6170/","name":"Simon Glass","email":"sjg@chromium.org"},"content":"Hi Torsten,\n\nOn Fri, 8 May 2026 at 09:42, Torsten Duwe wrote:\n>\n> From: Torsten Duwe \n>\n> If a device node got created dynamically, there is no guarantee that the\n> parent node has an associated device tree node which could specify dma\n> constraints. Especially PCI(e) enumeration adds intermediate \"bus nodes\",\n> also dynamically.\n>\n> Try harder to find the correct configuration by walking up the tree until\n> a DT association is found.\n>\n> Suggested-by: Neil Armstrong \n> Signed-off-by: Torsten Duwe \n>\n> ---\n> drivers/core/device.c | 14 +++++++++++++-\n> 1 file changed, 13 insertions(+), 1 deletion(-)\n>\n> diff --git a/drivers/core/device.c b/drivers/core/device.c\n> index 779f371b9d5..9de64dbb3c5 100644\n> --- a/drivers/core/device.c\n> +++ b/drivers/core/device.c\n> @@ -459,7 +459,19 @@ static int device_get_dma_constraints(struct udevice *dev)\n> u64 size = 0;\n> int ret;\n>\n> - if (!CONFIG_IS_ENABLED(DM_DMA) || !parent || !dev_has_ofnode(parent))\n> + if (!CONFIG_IS_ENABLED(DM_DMA) || !parent)\n> + return 0;\n> +\n> + /* Look for the first node in the parent chain */\n> + while (parent) {\n> + if (dev_has_ofnode(parent))\n> + break;\n> +\n> + parent = dev_get_parent(parent);\n> + }\n> +\n> + /* No parents have a node, bail out */\n> + if (!parent)\n> return 0;\n>\n> /*\n> --\n> 2.54.0\n>\n\nThere's already a unit test for device_get_dma_constraints() in\ntest/dm/read.c (dm_test_dma_ranges). Since you are extending it to\nwalk past nodes without an ofnode, please can you add a case\nexercising the new path - a sandbox device whose immediate parent has\nno DT reference should do it.\n\nRegards,\nSimon","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=chromium.org header.i=@chromium.org header.a=rsa-sha256\n header.s=google header.b=YzwFNWB3;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=pass (p=none dis=none) header.from=chromium.org","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=chromium.org header.i=@chromium.org\n header.b=\"YzwFNWB3\";\n\tdkim-atps=neutral","phobos.denx.de;\n dmarc=pass (p=none dis=none) header.from=chromium.org","phobos.denx.de;\n spf=pass smtp.mailfrom=sjg@chromium.org"],"Received":["from phobos.denx.de (phobos.denx.de\n [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4gBymq1NHrz1yJq\n\tfor ; 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Fri, 08 May 2026\n 11:47:57 -0700 (PDT)","MIME-Version":"1.0","References":"<20260508154108.336B968BEB@verein.lst.de>\n <20260508154239.1E16368BFE@verein.lst.de>","In-Reply-To":"<20260508154239.1E16368BFE@verein.lst.de>","From":"Simon Glass ","Date":"Fri, 8 May 2026 12:47:45 -0600","X-Gm-Features":"AVHnY4LHjO64f65-nsrEYvxN3fFRJxzNSDoS_sfcRGmXHG5rK8V61-6NfiCo3nA","Message-ID":"\n ","Subject":"Re: [PATCH 1/3] core: Skip parent device nodes without a DT reference\n when looking for dma-ranges","To":"Torsten Duwe ","Cc":"Peter Robinson ,\n Matthias Brugger , Bin Meng ,\n Andrew Goodbody , Tom Rini ,\n Andrea della Porta ,\n Neil Armstrong ,\n =?utf-8?b?SmFuIMSMZXJtw6Fr?= , u-boot@lists.denx.de","Content-Type":"text/plain; charset=\"UTF-8\"","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"}},{"id":3688696,"web_url":"http://patchwork.ozlabs.org/comment/3688696/","msgid":"<20260508214222.642b15cb@lst.de>","list_archive_url":null,"date":"2026-05-08T19:42:22","subject":"Re: [PATCH 1/3] core: Skip parent device nodes without a DT\n reference when looking for dma-ranges","submitter":{"id":2722,"url":"http://patchwork.ozlabs.org/api/people/2722/","name":"Torsten Duwe","email":"duwe@lst.de"},"content":"On Fri, 8 May 2026 12:47:45 -0600\nSimon Glass wrote:\n[...]\n> There's already a unit test for device_get_dma_constraints() in\n> test/dm/read.c (dm_test_dma_ranges). Since you are extending it to\n> walk past nodes without an ofnode, please can you add a case\n> exercising the new path - a sandbox device whose immediate parent has\n> no DT reference should do it.\n\nI'll have a look.\n\nTalking unit tests, is it just me who experiences reproducible crashes\non RPi5 with today's master branch?\n\n\tTorsten","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=fail (p=none dis=none) header.from=lst.de","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n dmarc=fail (p=none dis=none) header.from=lst.de","phobos.denx.de; spf=pass smtp.mailfrom=duwe@lst.de"],"Received":["from phobos.denx.de (phobos.denx.de\n [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4gBzzq1njTz1yKd\n\tfor ; Sat, 09 May 2026 05:42:47 +1000 (AEST)","from h2850616.stratoserver.net (localhost [IPv6:::1])\n\tby phobos.denx.de (Postfix) with ESMTP id 5F72484C92;\n\tFri, 8 May 2026 21:42:44 +0200 (CEST)","by phobos.denx.de (Postfix, from userid 109)\n id 4D44984D2F; Fri, 8 May 2026 21:42:43 +0200 (CEST)","from verein.lst.de (verein.lst.de [213.95.11.211])\n (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n (No client certificate requested)\n by phobos.denx.de (Postfix) with ESMTPS id F22AE84B02\n for ; Fri, 8 May 2026 21:42:39 +0200 (CEST)","by verein.lst.de (Postfix, from userid 107)\n id AA99A68C4E; Fri, 8 May 2026 21:42:38 +0200 (CEST)","from localhost (dynamic-095-117-005-203.95.117.pool.telefonica.de\n [95.117.5.203])\n by verein.lst.de (Postfix) with ESMTPSA id 33D5F67328;\n Fri, 8 May 2026 21:42:23 +0200 (CEST)"],"X-Spam-Checker-Version":"SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de","X-Spam-Level":"","X-Spam-Status":"No, score=-1.9 required=5.0 tests=BAYES_00,\n RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham\n autolearn_force=no version=3.4.2","Date":"Fri, 8 May 2026 21:42:22 +0200","From":"Torsten Duwe ","To":"Simon Glass ","Cc":"Peter Robinson ,\n Matthias Brugger , Bin Meng ,\n Andrew Goodbody , Tom Rini ,\n Andrea della Porta ,\n Neil Armstrong ,\n Jan =?utf-8?b?xIxlcm3DoWs=?= , u-boot@lists.denx.de","Subject":"Re: [PATCH 1/3] core: Skip parent device nodes without a DT\n reference when looking for dma-ranges","Message-ID":"<20260508214222.642b15cb@lst.de>","In-Reply-To":"\n ","References":"<20260508154108.336B968BEB@verein.lst.de>\n <20260508154239.1E16368BFE@verein.lst.de>\n ","Organization":"LST e.V.","X-Mailer":"Claws Mail 4.3.1 (GTK 3.24.50; aarch64-suse-linux-gnu)","MIME-Version":"1.0","Content-Type":"text/plain; charset=US-ASCII","Content-Transfer-Encoding":"7bit","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"}},{"id":3688698,"web_url":"http://patchwork.ozlabs.org/comment/3688698/","msgid":"","list_archive_url":null,"date":"2026-05-08T19:56:22","subject":"Re: [PATCH 1/3] core: Skip parent device nodes without a DT reference\n when looking for dma-ranges","submitter":{"id":13206,"url":"http://patchwork.ozlabs.org/api/people/13206/","name":"Peter Robinson","email":"pbrobinson@gmail.com"},"content":"On Fri, 8 May 2026 at 20:42, Torsten Duwe wrote:\n>\n> On Fri, 8 May 2026 12:47:45 -0600\n> Simon Glass wrote:\n> [...]\n> > There's already a unit test for device_get_dma_constraints() in\n> > test/dm/read.c (dm_test_dma_ranges). Since you are extending it to\n> > walk past nodes without an ofnode, please can you add a case\n> > exercising the new path - a sandbox device whose immediate parent has\n> > no DT reference should do it.\n>\n> I'll have a look.\n>\n> Talking unit tests, is it just me who experiences reproducible crashes\n> on RPi5 with today's master branch?\n\nNot just you, I saw crashes when I tested rc1 but I've not had time to\nbisect it and see what other platforms are affected.","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=TMl/1dCs;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; 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Fri, 08 May 2026\n 12:56:34 -0700 (PDT)","MIME-Version":"1.0","References":"<20260508154108.336B968BEB@verein.lst.de>\n <20260508154239.1E16368BFE@verein.lst.de>\n \n <20260508214222.642b15cb@lst.de>","In-Reply-To":"<20260508214222.642b15cb@lst.de>","From":"Peter Robinson ","Date":"Fri, 8 May 2026 20:56:22 +0100","X-Gm-Features":"AVHnY4JGX7S_xS7yrOzb2DDt6bQVna__diWMp36Y3wQ4NhjM03RFCjZ8knFibPk","Message-ID":"\n ","Subject":"Re: [PATCH 1/3] core: Skip parent device nodes without a DT reference\n when looking for dma-ranges","To":"Torsten Duwe ","Cc":"Simon Glass , Matthias Brugger ,\n Bin Meng , Andrew Goodbody ,\n Tom Rini , Andrea della Porta ,\n Neil Armstrong ,\n =?utf-8?b?SmFuIMSMZXJtw6Fr?= , u-boot@lists.denx.de","Content-Type":"text/plain; charset=\"UTF-8\"","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"}},{"id":3688777,"web_url":"http://patchwork.ozlabs.org/comment/3688777/","msgid":"","list_archive_url":null,"date":"2026-05-08T23:36:52","subject":"Re: [PATCH 1/3] core: Skip parent device nodes without a DT reference\n when looking for dma-ranges","submitter":{"id":6170,"url":"http://patchwork.ozlabs.org/api/people/6170/","name":"Simon Glass","email":"sjg@chromium.org"},"content":"Hi Peter,\n\nOn Fri, 8 May 2026 at 13:56, Peter Robinson wrote:\n>\n> On Fri, 8 May 2026 at 20:42, Torsten Duwe wrote:\n> >\n> > On Fri, 8 May 2026 12:47:45 -0600\n> > Simon Glass wrote:\n> > [...]\n> > > There's already a unit test for device_get_dma_constraints() in\n> > > test/dm/read.c (dm_test_dma_ranges). Since you are extending it to\n> > > walk past nodes without an ofnode, please can you add a case\n> > > exercising the new path - a sandbox device whose immediate parent has\n> > > no DT reference should do it.\n> >\n> > I'll have a look.\n> >\n> > Talking unit tests, is it just me who experiences reproducible crashes\n> > on RPi5 with today's master branch?\n>\n> Not just you, I saw crashes when I tested rc1 but I've not had time to\n> bisect it and see what other platforms are affected.\n\nI just did a bisect and this is the start and end of it:\n\nHEAD is now at 88dc2788777 Prepare v2026.04\n✔ ~/u [v2026.04|✔]\n17:08 $ ub-smoke rpi5\n.\n [100%]\n1 passed in 29.02s\n✔ ~/u [v2026.04|…1]\n17:08 $ good\nYou need to start by \"git bisect start\"\n\nDo you want me to do it for you [Y/n]?\nstatus: waiting for both good and bad commits\nstatus: waiting for bad commit, 1 good commit known\n✔ ~/u [v2026.04|BISECTING|…1]\n17:09 $ co us/master\nPrevious HEAD position was 88dc2788777 Prepare v2026.04\nHEAD is now at 3cdd19089f1 Merge tag 'mmc-for-2026.07-rc2' of\nhttps://source.denx.de/u-boot/custodians/u-boot-mmc\n✔ ~/u [:3cdd19089f1|BISECTING|…1]\n17:09 $ ub-smoke rpi5\nE\n [100%]\n============================================= ERRORS\n=============================================\n_______________________________ ERROR at setup of test_uboot_smoke","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=chromium.org header.i=@chromium.org header.a=rsa-sha256\n header.s=google header.b=j97YbvSr;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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