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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9278FC4332F for ; Fri, 25 Mar 2022 21:40:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233534AbiCYVmH (ORCPT ); Fri, 25 Mar 2022 17:42:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51128 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233533AbiCYVmE (ORCPT ); Fri, 25 Mar 2022 17:42:04 -0400 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.85.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 957636E34C for ; Fri, 25 Mar 2022 14:40:25 -0700 (PDT) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-198-v6S2T8p_MaetwOyqgJM0fQ-1; Fri, 25 Mar 2022 21:40:22 +0000 X-MC-Unique: v6S2T8p_MaetwOyqgJM0fQ-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Fri, 25 Mar 2022 21:40:20 +0000 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.033; Fri, 25 Mar 2022 21:40:20 +0000 From: David Laight To: 'Johannes Berg' , Linus Torvalds CC: Maxime Bizon , =?utf-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= , Robin Murphy , Christoph Hellwig , Oleksandr Natalenko , Halil Pasic , "Marek Szyprowski" , Kalle Valo , "David S. Miller" , Jakub Kicinski , "Paolo Abeni" , Olha Cherevyk , iommu , linux-wireless , Netdev , "Linux Kernel Mailing List" , Greg Kroah-Hartman , stable Subject: RE: [REGRESSION] Recent swiotlb DMA_FROM_DEVICE fixes break ath9k-based AP Thread-Topic: [REGRESSION] Recent swiotlb DMA_FROM_DEVICE fixes break ath9k-based AP Thread-Index: AQHYQI1aK/9JYQDqEEKfLChLw6SC36zQnHkQ Date: Fri, 25 Mar 2022 21:40:20 +0000 Message-ID: <19b4ad5f9909446ea0eca93f9b5b4c40@AcuMS.aculab.com> References: <1812355.tdWV9SEqCh@natalenko.name> <20220324055732.GB12078@lst.de> <4386660.LvFx2qVVIh@natalenko.name> <81ffc753-72aa-6327-b87b-3f11915f2549@arm.com> <878rsza0ih.fsf@toke.dk> <4be26f5d8725cdb016c6fdd9d05cfeb69cdd9e09.camel@freebox.fr> <20220324163132.GB26098@lst.de> <871qyr9t4e.fsf@toke.dk> <31434708dcad126a8334c99ee056dcce93e507f1.camel@freebox.fr> <298f4f9ccad7c3308d3a1fd8b4b4740571305204.camel@sipsolutions.net> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SSd2ZSBiZWVuIHRoaW5raW5nIG9mIHRoZSBjYXNlIHdoZXJlIGEgZGVzY3JpcHRvciByaW5nIGhh cw0KdG8gYmUgaW4gbm9uLWNvaGVyZW50IG1lbW9yeSAoZWcgYmVjYXVzZSB0aGF0IGlzIGFsbCB0 aGVyZSBpcykuDQoNClRoZSByZWNlaXZlIHJpbmcgcHJvY2Vzc2luZyBpc24ndCBhY3R1YWxseSB0 aGF0IGRpZmZpY3VsdC4NCg0KVGhlIGRyaXZlciBoYXMgdG8gZmlsbCBhIGNhY2hlIGxpbmUgZnVs bCBvZiBuZXcgYnVmZmVyDQpkZXNjcmlwdG9ycyBpbiBtZW1vcnkgYnV0IHdpdGhvdXQgYXNzaWdu aW5nIHRoZSBmaXJzdA0KYnVmZmVyIHRvIHRoZSBoYXJkd2FyZS4NClRoZW4gaXQgaGFzIHRvIGRv IGEgY2FjaGUgbGluZSB3cml0ZSBvZiBqdXN0IHRoYXQgbGluZS4NClRoZW4gaXQgY2FuIGFzc2ln biBvd25lcnNoaXAgb2YgdGhlIGZpcnN0IGJ1ZmZlciBhbmQNCmZpbmFsbHkgZG8gYSBzZWNvbmQg Y2FjaGUgbGluZSB3cml0ZS4NCihUaGUgZmlyc3QgZXhwbGljaXQgd3JpdGUgY2FuIGJlIHNraXBw ZWQgaWYgdGhlIGNhY2hlDQp3cml0ZXMgYXJlIGtub3duIHRvIGJlIGF0b21pYy4pDQpJdCB0aGVu IG11c3Qgbm90IGRpcnR5IHRoYXQgY2FjaGUgbGluZS4NCg0KVG8gY2hlY2sgZm9yIG5ldyBmcmFt ZXMgaXQgbXVzdCBpbnZhbGlkYXRlIHRoZSBjYWNoZQ0KbGluZSB0aGF0IGNvbnRhaW5zIHRoZSAn bmV4dCB0byBiZSBmaWxsZWQnIGRlc2NyaXB0b3INCmFuZCB0aGVuIHJlYWQgdGhhdCBjYWNoZSBs aW5lLg0KVGhpcyB3aWxsIGNvbnRhaW4gaW5mbyBhYm91dCBvbmUgb3IgbW9yZSByZWNlaXZlIGZy YW1lcy4NCkJ1dCB0aGUgaGFyZHdhcmUgaXMgc3RpbGwgZG9pbmcgdXBkYXRlcy4NCg0KQnV0IGJv dGggdGhlc2Ugb3BlcmF0aW9ucyBjYW4gYmUgaGFwcGVuaW5nIGF0IHRoZSBzYW1lDQp0aW1lIG9u IGRpZmZlcmVudCBwYXJ0cyBvZiB0aGUgYnVmZmVyLg0KDQpTbyB5b3UgbmVlZCB0byBrbm93IGEg J2NhY2hlIGxpbmUgc2l6ZScgZm9yIHRoZSBtYXBwaW5nDQphbmQgYmUgYWJsZSB0byBkbyB3cml0 ZWJhY2tzIGFuZCBpbnZhbGlkYXRlcyBmb3IgcGFydHMNCm9mIHRoZSBidWZmZXIsIG5vdCBqdXN0 IGFsbCBvZiBpdC4NCg0KVGhlIHRyYW5zbWl0IHNpZGUgaXMgaGFyZGVyLg0KSXQgZWl0aGVyIHJl cXVpcmVzIHdhaXRpbmcgZm9yIGFsbCBwZW5kaW5nIHRyYW5zbWl0cyB0bw0KZmluaXNoIG9yIHNw bGl0dGluZyBhIHNpbmdsZSB0cmFuc21pdCBpbnRvIGVub3VnaCBmcmFnbWVudHMNCnRoYXQgaXRz IGRlc2NyaXB0b3JzIGVuZCBvbiBhIGNhY2hlIGxpbmUgYm91bmRhcnkuDQpCdXQgYWdhaW4sIGFu ZCBpZiB0aGUgaW50ZXJmYWNlIGlzIGJ1c3ksIHlvdSB3YW50IHRoZSBjcHUNCnRvIGJlIGFibGUg dG8gdXBkYXRlIG9uZSBjYWNoZSBsaW5lIG9mIHRyYW5zbWl0IGRlc2NyaXB0b3JzDQp3aGlsZSB0 aGUgZGV2aWNlIGlzIHdyaXRpbmcgdHJhbnNtaXQgY29tcGxldGlvbiBzdGF0dXMNCnRvIHRoZSBw cmV2aW91cyBjYWNoZSBsaW5lLg0KDQpJIGRvbid0IHRoaW5rIHRoYXQgaXMgbWF0ZXJpYWxseSBk aWZmZXJlbnQgZm9yIG5vbi1jb2hlcmVudA0KbWVtb3J5IG9yIGJvdW5jZSBidWZmZXJzLg0KQnV0 IHBhcnRpYWwgZmx1c2gvaW52YWxpZGF0ZSBpcyBuZWVkZWQuDQoNCglEYXZpZA0KDQotDQpSZWdp c3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWlsdG9u IEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMpDQo=