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 1ED5AC433F5 for ; Fri, 25 Mar 2022 22:41:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233900AbiCYWmz (ORCPT ); Fri, 25 Mar 2022 18:42:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48454 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233889AbiCYWms (ORCPT ); Fri, 25 Mar 2022 18:42:48 -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 3B3F6203A48 for ; Fri, 25 Mar 2022 15:41:06 -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-132-bzPiuRSPOXqPuBduQ2feJg-1; Fri, 25 Mar 2022 22:41:04 +0000 X-MC-Unique: bzPiuRSPOXqPuBduQ2feJg-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 22:41:02 +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 22:41:01 +0000 From: David Laight To: 'Linus Torvalds' , Johannes Berg 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: AQHYQJM6K/9JYQDqEEKfLChLw6SC36zQrLFA Date: Fri, 25 Mar 2022 22:41:01 +0000 Message-ID: <273dec6267b249ca941558c268390fbc@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: stable@vger.kernel.org RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMjUgTWFyY2ggMjAyMiAyMTo1Nw0KPiANCj4g T24gRnJpLCBNYXIgMjUsIDIwMjIgYXQgMjoxMyBQTSBKb2hhbm5lcyBCZXJnIDxqb2hhbm5lc0Bz aXBzb2x1dGlvbnMubmV0PiB3cm90ZToNCj4gPg0KPiA+IFdlbGwgSSBzZWUgbm93IHRoYXQgeW91 IHNhaWQgJ2NhY2hlICJ3cml0ZWJhY2siJyBpbiAoMSksIGFuZCAnZmx1c2gnIGluDQo+ID4gKDIp LCBzbyBwZXJoYXBzIHlvdSB3ZXJlIHRoaW5raW5nIG9mIHRoZSBzYW1lLCBhbmQgSSdtIGp1c3Qg Y2FsbGluZyBpdA0KPiA+ICJmbHVzaCIgYW5kICJpbnZhbGlkYXRlIiByZXNwZWN0aXZlbHk/DQo+ IA0KPiBZZWFoLCBzbyBJIG1lbnRhbGx5IHRlbmQgdG8gdGhpbmsgb2YgdGhlIG9wZXJhdGlvbnMg YXMganVzdA0KPiAid3JpdGViYWNrIiAod2hpY2ggZG9lc24ndCBpbnZhbGlkYXRlKSBhbmQgImZs dXNoIiAod2hpY2ggaXMgYQ0KPiB3cml0ZWJhY2staW52YWxpZGF0ZSkuDQoNCkl0IGFsbW9zdCBj ZXJ0YWlubHkgZG9lc24ndCBtYXR0ZXIgd2hldGhlciB0aGUgIndyaXRlYmFjayINCmludmFsaWRh dGVzIG9yIG5vdC4NCllvdSBoYXZlIHRvIGFzc3VtZSB0aGF0IGFsbCBzb3J0cyBvZiBvcGVyYXRp b25zIG1pZ2h0IGNhdXNlDQp0aGUgY3B1IHRvIHJlYWQgaW4gYSBjYWNoZWxpbmUuDQpUaGlzIGlu Y2x1ZGVzLCBidXQgaXMgbm90IGxpbWl0ZWQgdG8sIHNwZWN1bGF0aXZlIGV4ZWN1dGlvbg0KYW5k IGNhY2hlIGxpbmUgcHJlZmV0Y2guDQoNCkJ1dCB5b3UgZGVmaW5pdGVseSBuZWVkIGFuICJpbnZh bGlkYXRlIiB0byBmb3JjZSBhIGNhY2hlIGxpbmUNCmJlIHJlYWQgYWZ0ZXIgdGhlIGhhcmR3YXJl IGhhcyBhY2Nlc3NlZCBpdC4NCk5vdyBzdWNoIGxpbmVzIG11c3Qgbm90IGJlIGRpcnR5OyBiZWNh dXNlIHRoZSBjcHUgY2FuIHdyaXRlDQpiYWNrIGEgZGlydHkgY2FjaGUgbGluZSBhdCBhbnkgdGlt ZSAtIHdoaWNoIHdvdWxkIGJyZWFrIHRoaW5ncy4NClNvIHRoaXMgY2FuIGFsc28gYmUgIndyaXRl IGJhY2sgaWYgZGlydHkiIGFuZCAiaW52YWxpZGF0ZSIuDQoNCkJvdW5jZSBidWZmZXJzIGFuZCBj YWNoZSBwcm9iYWJseSB3b3JrIG11Y2ggdGhlIHNhbWUgd2F5Lg0KQnV0IGZvciBib3VuY2UgYnVm ZmVycyBJIGd1ZXNzIHlvdSB3YW50IHRvIGVuc3VyZSB0aGUgaW5pdGlhbGx5DQphbGxvY2F0ZWQg YnVmZmVyIGRvZXNuJ3QgY29udGFpbiBvbGQgZGF0YSAoYmVsb25naW5nIHRvDQpzb21lb25lIGVs c2UpLg0KU28geW91IG1pZ2h0IGRlY2lkZSB0byB6ZXJvIHRoZW0gb24gYWxsb2NhdGlvbiBvciBh bHdheXMgY29weQ0KZnJvbSB0aGUgZHJpdmVyIGJ1ZmZlciBvbiB0aGUgZmlyc3QgcmVxdWVzdC4N Cg0KVGhlbiB5b3UgZ2V0IHRoZSByZWFsbHkgYW5ub3lpbmcgY3B1IHRoYXQgZG9uJ3QgaGF2ZSBh IA0KIndyaXRlIGJhY2sgZGlydHkgbGluZSBhbmQgaW52YWxpZGF0ZSIgb3Bjb2RlLg0KQW5kIHRo ZSBvbmx5IHdheSBpcyB0byByZWFkIGVub3VnaCBvdGhlciBtZW1vcnkgYXJlYXMNCnRvIGRpc3Bs YWNlIGFsbCB0aGUgZXhpc3RpbmcgY2FjaGUgbGluZSBkYXRhLg0KWW91IHByb2JhYmx5IG1pZ2h0 IGFzIHdlbGwgZ2l2ZSB1cCBhbmQgdXNlIFBJTyA6LSkNCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVy ZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5 bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==