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 smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 D1905C4332F for ; Sat, 26 Mar 2022 22:38:40 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 652CE410B0; Sat, 26 Mar 2022 22:38:40 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id CFU6Dp1cCy34; Sat, 26 Mar 2022 22:38:39 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp4.osuosl.org (Postfix) with ESMTPS id 20FBA410AE; Sat, 26 Mar 2022 22:38:39 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id E4F25C001D; Sat, 26 Mar 2022 22:38:38 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id BB407C0012 for ; Sat, 26 Mar 2022 22:38:37 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id B321A813E5 for ; Sat, 26 Mar 2022 22:38:37 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VK-D5Qr-65H0 for ; Sat, 26 Mar 2022 22:38:33 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.86.151]) by smtp1.osuosl.org (Postfix) with ESMTPS id 4BD368127D for ; Sat, 26 Mar 2022 22:38:33 +0000 (UTC) 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-319-sg83NcgSN6CniSYATwmuJw-1; Sat, 26 Mar 2022 22:38:30 +0000 X-MC-Unique: sg83NcgSN6CniSYATwmuJw-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; Sat, 26 Mar 2022 22:38:27 +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; Sat, 26 Mar 2022 22:38:27 +0000 From: David Laight To: 'Linus Torvalds' , =?utf-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= 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: AQHYQUDBK/9JYQDqEEKfLChLw6SC36zSPELQ Date: Sat, 26 Mar 2022 22:38:27 +0000 Message-ID: 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> <20220326003853.44c3285c.pasic@linux.ibm.com> <8735j47l7y.fsf@toke.dk> 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 Cc: Netdev , Kalle Valo , linux-wireless , Oleksandr Natalenko , stable , Christoph Hellwig , Halil Pasic , Jakub Kicinski , iommu , Olha Cherevyk , Greg Kroah-Hartman , Maxime Bizon , Paolo Abeni , Robin Murphy , "David S. Miller" , Linux Kernel Mailing List 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-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMjYgTWFyY2ggMjAyMiAxODozOQ0KPiANCj4g T24gU2F0LCBNYXIgMjYsIDIwMjIgYXQgOTowNiBBTSBUb2tlIEjDuGlsYW5kLUrDuHJnZW5zZW4g PHRva2VAdG9rZS5kaz4gd3JvdGU6DQo+ID4NCj4gPiBJIHdhcyBhbHNvIHRveWluZyB3aXRoIHRo ZSBpZGVhIG9mIGhhdmluZyBhIGNvcHktYmFzZWQgcGVlayBoZWxwZXIgbGlrZToNCj4gPg0KPiA+ IHUzMiBkYXRhID0gZG1hX3BlZWtfd29yZChidWYsIG9mZnNldCkNCj4gDQo+IEkgcmVhbGx5IGRv bid0IHRoaW5rIHlvdSBjYW4gb3Igd2FudCB0byBoYXZlIGEgd29yZC1iYXNlZCBvbmUuDQo+IA0K PiBUaGF0IHNhaWQsIEkgbGlrZSB0aGUgKm5hbWUqIG9mIHRoYXQgdGhpbmcuDQo+IA0KPiBJIHRo aW5rIGEgbG90IG9mIGNvbmZ1c2lvbiBjb21lcyBmcm9tIHRoZSB2ZXJ5IHN1YnRsZSBuYW1pbmcg b2YNCj4gZnVuZGFtZW50YWxseSBoYXZpbmcgYSBsb3Qgb2Ygb2RkIGNvbmRpdGlvbnMgd2l0aA0K PiANCj4gIC0gdHdvIGRpZmZlcmVudCAiZGlyZWN0aW9ucyBvZiB0aGUgc3luYyIgLSBpZSB3aG8g aXQgaXMgdGhhdCBjYXJlczoNCj4gDQo+ICAgICAgICBkbWFfc3luY19zaW5nbGVfZm9yX3tjcHUs ZGV2aWNlfQ0KPiANCj4gIC0gdGhyZWUgZGlmZmVyZW50ICJkaXJlY3Rpb24gb2YgdGhlIGRhdGEi IC0gaWUgd2hvIGl0IGlzIHRoYXQgd3JpdGVzIHRoZSBkYXRhOg0KPiANCj4gICAgICAgICBETUFf RlJPTV9ERVZJQ0UgLyBETUFfVE9fREVWSUNFIC8gRE1BX0JJRElSRUNUSU9OQUwNCj4gDQo+IHNv IHlvdSBoYXZlIHNpeCBwb3NzaWJsZSBjb21iaW5hdGlvbnMsIHRocmVlIG9mIHdoaWNoIHNlZW0g aW5zYW5lIGFuZA0KPiBub3QgdXNlZnVsLCBhbmQgb2YgdGhlIHRocmVlIHRoYXQgYXJlIGFjdHVh bGx5IHBvc3NpYmxlLCBzb21lIGFyZSB2ZXJ5DQo+IHVudXN1YWwgKGl0IGV4YWN0bHkgdGhhdCAi ZGV2aWNlIGlzIHRoZSBvbmUgd3JpdGluZywgYnV0IHdlIHdhbnQgdG8NCj4gc3luYyB0aGUgZG1h IGFyZWEgZm9yIHRoZSBkZXZpY2UiKS4NCg0KQW5vdGhlciAyYyA6LSkNCg0KSXMgdGhlIGlkZWEg b2YgJ2J1ZmZlciBvd25lcnNoaXAnIGV2ZW4gYSBnb29kIG9uZT8NClBlcmhhcHMgdGhlIHdob2xl IHRoaW5nIHdvdWxkIGJlIGJldHRlciBkZXNjcmliZWQgaW4gdGVybXMgb2YNCndoYXQgaGFwcGVu cyB3aGVuIGJvdW5jZSBidWZmZXJzIGFyZSB1c2VkLg0KU28gdGhlcmUgYXJlIG5vdGlvbmFsbHkg dHdvIGJ1ZmZlcnMuDQpPbmUgYWNjZXNzZWQgYnkgdGhlIGNwdSwgdGhlIG90aGVyIGJ5IHRoZSBk ZXZpY2UuDQoNClRoZXJlIGFyZSB0aGVuIGp1c3QgMyB0aGluZ3MgdGhhdCBoYXBwZW46DQoxKSBE aXJ0eSBkYXRhIG1heSBnZXQgbW92ZWQgdG8gdGhlIG90aGVyIGJ1ZmZlciBhdCBhbnkgdGltZS4N CiAgIFNvIHRoZSBkcml2ZXIgbXVzdCBub3QgZGlydHkgYnVmZmVycyAoY2FjaGUgbGluZXMpIHRo YXQgdGhlDQogICBkZXZpY2UgbWlnaHQgd3JpdGUgdG8uDQoyKSBUaGUgY3B1IGhhcyB0byByZXF1 ZXN0IGRhdGEgYmUgY29waWVkIHRvIHRoZSBkZXZpY2UgYnVmZmVyDQogICBhZnRlciB1cGRhdGlu ZyB0aGUgY3B1IGJ1ZmZlci4NCiAgIFRoaXMgbWFrZXMgdGhlIGNwdSBidWZmZXIgJ25vdCBkaXJ0 eScgc28gY29waWVzICgxKSBjYW4gbm8NCiAgIGxvbmdlciBoYXBwZW4uDQozKSBUaGUgY3B1IGhh cyB0byByZXF1ZXN0IGRhdGEgYmUgY29waWVkIGZyb20gdGhlIGRldmljZSBidWZmZXINCiAgIGJl Zm9yZSBsb29raW5nIGF0IHRoZSBkYXRhLg0KQWxsIGNvcGllcyBhZmZlY3QgYSBkbWEtY2FjaGUt bGluZSBzaXplZCBibG9jayBvZiBkYXRhICh3aGljaA0KbWlnaHQgYmUgZGV2aWNlIGRlcGVuZGFu dCkuDQpBbiBvcHRpbWlzZWQgdmVyc2lvbiBvZiAoMikgdGhhdCBkb2Vzbid0IGFjdHVhbGx5IGRv IHRoZSBjb3B5DQpjYW4gYmUgaW1wbGVtZW50ZWQgZm9yIHVzZSBwcmlvciB0byByZWFkIHJlcXVl c3RzLg0KDQpGb3IgY2FjaGUtY29oZXJlbnQgbWVtb3J5IG9ubHkgKDEpIGhhcHBlbnMgYW5kICgy KSBhbmQgKDMpDQphcmUgbm8gb3BlcmF0aW9ucy4NCkZvciBub24tY29oZXJlbnQgbWVtb3J5ICgy KSBpcyB3cml0ZS1iYWNrLWFuZC1pbnZhbGlkYXRlIGFuZA0KKDMpIG1pZ2h0IGp1c3QgYmUgYW4g aW52YWxpZGF0ZS4NCkZvciBib3VuY2UgYnVmZmVycyBhbGwgYXJlIGFjdHVhbCBjb3BpZXMgLSBh bmQgYWRkaXRpb25hbA0Kb3BlcmF0aW9ucyBtaWdodCBiZSBuZWVkZWQgZm9yIGRldmljZSBhY2Nl c3MgdG8gdGhlIGJvdW5jZQ0KYnVmZmVyIGl0c2VsZi4NCg0KRm9yIHNlY3VyaXR5IHJlYXNvbnMg Ym91bmNlIGJ1ZmZlcnMgbWF5IG5lZWQgaW5pdGlhbGlzaW5nLg0KQnV0IHRoaXMgd291bGQgYmUg ZG9uZSB3aGVuIHRoZXkgYXJlIGFsbG9jYXRlZC4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQg QWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVz LCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCl9fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlz dAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91 bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==