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 smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 E0D70C433F5 for ; Fri, 25 Mar 2022 18:42:29 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 86A0B60BAA; Fri, 25 Mar 2022 18:42:29 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GJGCbX_s_i8O; Fri, 25 Mar 2022 18:42:28 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp3.osuosl.org (Postfix) with ESMTPS id 6D37360BB0; Fri, 25 Mar 2022 18:42:28 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 43E02C002C; Fri, 25 Mar 2022 18:42:28 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 82D98C0012 for ; Fri, 25 Mar 2022 18:42:27 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 71AA060BB0 for ; Fri, 25 Mar 2022 18:42:27 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DEvtyKxmsLnD for ; Fri, 25 Mar 2022 18:42:26 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp3.osuosl.org (Postfix) with ESMTP id C52D160BAA for ; Fri, 25 Mar 2022 18:42:26 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id F1AF313D5; Fri, 25 Mar 2022 11:42:25 -0700 (PDT) Received: from [10.57.41.19] (unknown [10.57.41.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id F0FCD3F73D; Fri, 25 Mar 2022 11:42:22 -0700 (PDT) Message-ID: Date: Fri, 25 Mar 2022 18:42:19 +0000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [REGRESSION] Recent swiotlb DMA_FROM_DEVICE fixes break ath9k-based AP Content-Language: en-GB To: =?UTF-8?Q?Toke_H=c3=b8iland-J=c3=b8rgensen?= , Christoph Hellwig , Halil Pasic References: <1812355.tdWV9SEqCh@natalenko.name> <27b5a287-7a33-9a8b-ad6d-04746735fb0c@arm.com> <20220324190216.0efa067f.pasic@linux.ibm.com> <20220325163204.GB16426@lst.de> <87y20x7vaz.fsf@toke.dk> From: Robin Murphy In-Reply-To: <87y20x7vaz.fsf@toke.dk> Cc: Netdev , Kalle Valo , linux-wireless , Oleksandr Natalenko , stable , Linux Kernel Mailing List , iommu , Olha Cherevyk , Greg Kroah-Hartman , Jakub Kicinski , Paolo Abeni , Linus Torvalds , "David S. Miller" X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gMjAyMi0wMy0yNSAxODoxNSwgVG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2VuIHdyb3RlOgo+IENo cmlzdG9waCBIZWxsd2lnIDxoY2hAbHN0LmRlPiB3cml0ZXM6Cj4gCj4+IE9uIFRodSwgTWFyIDI0 LCAyMDIyIGF0IDA3OjAyOjE2UE0gKzAxMDAsIEhhbGlsIFBhc2ljIHdyb3RlOgo+Pj4+IElmCj4+ Pj4gZGRiZDg5ZGViN2QzIGFsb25lIHR1cm5zIG91dCB0byB3b3JrIE9LIHRoZW4gSSdkIGJlIGlu Y2xpbmVkIHRvIHRyeSBhCj4+Pj4gcGFydGlhbCByZXZlcnQgb2YganVzdCB0aGF0IG9uZSBodW5r Lgo+Pj4+Cj4+Pgo+Pj4gSSdtIG5vdCBhZ2FpbnN0IGJlaW5nIHByYWdtYXRpYyBhbmQgZG9pbmcg dGhlIHBhcnRpYWwgcmV2ZXJ0LiBCdXQgYXMKPj4+IGV4cGxhaW5lZCBhYm92ZSwgSSBkbyBiZWxp ZXZlIGZvciBjb3JyZWN0bmVzcyBvZiBzd2lvdGxiIHdlIHVsdGltYXRlbHkKPj4+IGRvIG5lZWQg dGhhdCBjaGFuZ2UuIFNvIGlmIHRoZSByZXZlcnQgaXMgdGhlIHNob3J0IHRlcm0gc29sdXRpb24s Cj4+PiB3aGF0IHNob3VsZCBiZSBvdXIgbWlkLXRlcm0gcm9hZC1tYXA/Cj4+Cj4+IFVubGVzcyBJ J20gbWlzdW5kZXJzdGFuZGluZyB0aGlzIHRocmVhZCB3ZSBmb3VuZCB0aGUgYnVnIGluIGF0aDlr Cj4+IGFuZCBoYXZlIGEgZml4IGZvciB0aGF0IG5vdz8KPiAKPiBBY2NvcmRpbmcgdG8gTWF4aW0n cyBjb21tZW50IG9uIHRoZSBvdGhlciBzdWJ0aHJlYWQsIHRoYXQgYXRoOWsgcGF0Y2gKPiB3b3Vs ZG4ndCB3b3JrIG9uIGFsbCBwbGF0Zm9ybXMgKGFuZCBjb25zdGl0dXRlcyBhIGJpdCBvZiBhIHZp b2xhdGlvbiBvZgo+IHRoZSBETUEgQVBJIG93bmVyc2hpcCBhYnN0cmFjdGlvbikuIFNvIG5vdCBx dWl0ZSwgSSB0aGluaz8KCkluZGVlZCwgaXQgd291bGQgcG90ZW50aWFsbHkgc3RhbmQgdG8gcG9z ZSB0aGUgc2FtZSBwcm9ibGVtIGFzIHRoZSAKU1dJT1RMQiBjaGFuZ2UsIGJ1dCBvbiB0aGUgc2Nh bGUgb2YgaW5kaXZpZHVhbCBjYWNoZSBsaW5lcyB0b3VjaGVkIGJ5IAphdGg5a19od19wcm9jZXNz X3J4ZGVzY19lZG1hKCkgcmF0aGVyIHRoYW4gdGhlIHdob2xlIGJ1ZmZlci4gSG93ZXZlciwgCnRo YXQgbWlnaHQgcmVwcmVzZW50IGEgbGVzcyBzZXZlcmUgaW1wYWN0IG9uIGEgc21hbGxlciBudW1i ZXIgb2YgdXNlcnMgCihtYXliZSB0aGUgTUlQUyBzeXN0ZW1zPyBJJ20gbm90IHN1cmUuLi4pIHNv IHBlcmhhcHMgaXQncyBhbiBhY2NlcHRhYmxlIAp0b3VybmlxdWV0PyBOb3RlIHRoYXQgdGhlIGN1 cnJlbnQgY29kZSBpcyBhbHJlYWR5IGEgdmlvbGF0aW9uIG9mIHRoZSBETUEgCkFQSSAoYmVjYXVz ZSB0aGUgZGV2aWNlIGtlZXBzIHdyaXRpbmcgZXZlbiB3aGVuIGl0IGRvZXNuJ3QgaGF2ZSAKb3du ZXJzaGlwKSwgc28gdGhlcmUncyBub3QgYSB2ZXJ5IHN0cm9uZyBhcmd1bWVudCBpbiB0aGF0IHJl Z2FyZC4KClRoYW5rcywKUm9iaW4uCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0 aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5m by9pb21tdQ==