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 smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 DD9D2C433F5 for ; Thu, 24 Mar 2022 14:58:39 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 7FFB0828F7; Thu, 24 Mar 2022 14:58:39 +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 P-KBT_NdjXfK; Thu, 24 Mar 2022 14:58:38 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp1.osuosl.org (Postfix) with ESMTPS id 5003F8246F; Thu, 24 Mar 2022 14:58:38 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 36147C001A; Thu, 24 Mar 2022 14:58:38 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [IPv6:2605:bc80:3010::137]) by lists.linuxfoundation.org (Postfix) with ESMTP id DE57DC000B for ; Thu, 24 Mar 2022 14:34:30 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id CDEB24155B for ; Thu, 24 Mar 2022 14:34:30 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp4.osuosl.org (amavisd-new); dkim=pass (2048-bit key) header.d=toke.dk 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 JURJ8o76U37S for ; Thu, 24 Mar 2022 14:34:29 +0000 (UTC) X-Greylist: delayed 00:06:32 by SQLgrey-1.8.0 Received: from mail.toke.dk (mail.toke.dk [45.145.95.4]) by smtp4.osuosl.org (Postfix) with ESMTPS id B31054154F for ; Thu, 24 Mar 2022 14:34:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=toke.dk; s=20161023; t=1648132071; bh=tnWUB/odmMKWGyF8he0G98tAGrRwpBch0DMAenM1KqE=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=Nl31SHkGEOpmzbhGTx/T436+jfkG7FgLD/mSjYD7BSj0K+POWTP/XdxPCiodxbxQl fs/0XEz6ZSEqIigCk9/SGOf78e9BBUztwbBZDzqH/ljmF35/Ft7SaJ2tb+ZfJ3B82v 5Ds6VCknje0VtdskIGdvIYT2IP30ry+Tg++Nwx0V4+GwyeAIHvqo5gXJBHda6FCGFN qWMkQGe87jzEr6SAA82toe9moP0NlIgQE7lxYyU93qrPdMDq9NoRbCop8YAlmyRwBG DCvoBiDd0G923RpGwr8v+jV+hGB48XSTTIsaeMsKUjkspEaeCquR+2Qwv8L3tLcNxb xaKx373cf/cWw== To: Robin Murphy , Oleksandr Natalenko , Christoph Hellwig Subject: Re: [REGRESSION] Recent swiotlb DMA_FROM_DEVICE fixes break ath9k-based AP In-Reply-To: <81ffc753-72aa-6327-b87b-3f11915f2549@arm.com> References: <1812355.tdWV9SEqCh@natalenko.name> <20220324055732.GB12078@lst.de> <4386660.LvFx2qVVIh@natalenko.name> <81ffc753-72aa-6327-b87b-3f11915f2549@arm.com> Date: Thu, 24 Mar 2022 15:27:50 +0100 X-Clacks-Overhead: GNU Terry Pratchett Message-ID: <878rsza0ih.fsf@toke.dk> MIME-Version: 1.0 X-Mailman-Approved-At: Thu, 24 Mar 2022 14:58:37 +0000 Cc: Netdev , Kalle Valo , linux-wireless , Linux Kernel Mailing List , stable , Halil Pasic , 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: , From: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= via iommu Reply-To: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Um9iaW4gTXVycGh5IDxyb2Jpbi5tdXJwaHlAYXJtLmNvbT4gd3JpdGVzOgoKPiBPbiAyMDIyLTAz LTI0IDEwOjI1LCBPbGVrc2FuZHIgTmF0YWxlbmtvIHdyb3RlOgo+PiBIZWxsby4KPj4gCj4+IE9u IMSNdHZydGVrIDI0LiBixZllem5hIDIwMjIgNjo1NzozMiBDRVQgQ2hyaXN0b3BoIEhlbGx3aWcg d3JvdGU6Cj4+PiBPbiBXZWQsIE1hciAyMywgMjAyMiBhdCAwODo1NDowOFBNICswMDAwLCBSb2Jp biBNdXJwaHkgd3JvdGU6Cj4+Pj4gSSdsbCBhZG1pdCBJIHN0aWxsIG5ldmVyIHF1aXRlIGdyYXNw ZWQgdGhlIHJlYXNvbiBmb3IgYWxzbyBhZGRpbmcgdGhlCj4+Pj4gb3ZlcnJpZGUgdG8gc3dpb3Rs Yl9zeW5jX3NpbmdsZV9mb3JfZGV2aWNlKCkgaW4gYWE2ZjhkY2JhYjQ3LCBidXQgSSB0aGluawo+ Pj4+IGJ5IHRoYXQgcG9pbnQgd2Ugd2VyZSBpbmNyZWFzaW5nbHkgdGlyZWQgYW5kIGNvbmZ1c2Vk IGFuZCBzdGFydGluZyB0bwo+Pj4+IHNlY29uZC1ndWVzcyBvdXJzZWx2ZXMgKHdlbGwsIEkgd2Fz LCBhdCBsZWFzdCkuIEkgZG9uJ3QgdGhpbmsgaXQncyB3cm9uZwo+Pj4+IHBlciBzZSwgYnV0IGFz IEkgc2FpZCBJIGRvIHRoaW5rIGl0IGNhbiBiaXRlIGFueW9uZSB3aG8ncyBiZWVuIGRvaW5nCj4+ Pj4gZG1hX3N5bmNfKigpIHdyb25nIGJ1dCBnZXR0aW5nIGF3YXkgd2l0aCBpdCB1bnRpbCBub3cu IElmIGRkYmQ4OWRlYjdkMwo+Pj4+IGFsb25lIHR1cm5zIG91dCB0byB3b3JrIE9LIHRoZW4gSSdk IGJlIGluY2xpbmVkIHRvIHRyeSBhIHBhcnRpYWwgcmV2ZXJ0IG9mCj4+Pj4ganVzdCB0aGF0IG9u ZSBodW5rLgo+Pj4KPj4+IEFncmVlZC4gIExldCdzIHRyeSB0aGF0IGZpcnN0Lgo+Pj4KPj4+IE9s ZWtzYW5kciwgY2FuIHlvdSB0cnkgdGhlIHBhdGNoIGJlbG93Ogo+Pj4KPj4+Cj4+PiBkaWZmIC0t Z2l0IGEva2VybmVsL2RtYS9zd2lvdGxiLmMgYi9rZXJuZWwvZG1hL3N3aW90bGIuYwo+Pj4gaW5k ZXggNmRiMWM0NzVlYzgyNy4uNmMzNTA1NTVlNWExYyAxMDA2NDQKPj4+IC0tLSBhL2tlcm5lbC9k bWEvc3dpb3RsYi5jCj4+PiArKysgYi9rZXJuZWwvZG1hL3N3aW90bGIuYwo+Pj4gQEAgLTcwMSwx MyArNzAxLDEwIEBAIHZvaWQgc3dpb3RsYl90YmxfdW5tYXBfc2luZ2xlKHN0cnVjdCBkZXZpY2Ug KmRldiwgcGh5c19hZGRyX3QgdGxiX2FkZHIsCj4+PiAgIHZvaWQgc3dpb3RsYl9zeW5jX3Npbmds ZV9mb3JfZGV2aWNlKHN0cnVjdCBkZXZpY2UgKmRldiwgcGh5c19hZGRyX3QgdGxiX2FkZHIsCj4+ PiAgIAkJc2l6ZV90IHNpemUsIGVudW0gZG1hX2RhdGFfZGlyZWN0aW9uIGRpcikKPj4+ICAgewo+ Pj4gLQkvKgo+Pj4gLQkgKiBVbmNvbmRpdGlvbmFsIGJvdW5jZSBpcyBuZWNlc3NhcnkgdG8gYXZv aWQgY29ycnVwdGlvbiBvbgo+Pj4gLQkgKiBzeW5jXypfZm9yX2NwdSBvciBkbWFfdW1tYXBfKiB3 aGVuIHRoZSBkZXZpY2UgZGlkbid0IG92ZXJ3cml0ZQo+Pj4gLQkgKiB0aGUgd2hvbGUgbGVuZ3Qg b2YgdGhlIGJvdW5jZSBidWZmZXIuCj4+PiAtCSAqLwo+Pj4gLQlzd2lvdGxiX2JvdW5jZShkZXYs IHRsYl9hZGRyLCBzaXplLCBETUFfVE9fREVWSUNFKTsKPj4+IC0JQlVHX09OKCF2YWxpZF9kbWFf ZGlyZWN0aW9uKGRpcikpOwo+Pj4gKwlpZiAoZGlyID09IERNQV9UT19ERVZJQ0UgfHwgZGlyID09 IERNQV9CSURJUkVDVElPTkFMKQo+Pj4gKwkJc3dpb3RsYl9ib3VuY2UoZGV2LCB0bGJfYWRkciwg c2l6ZSwgRE1BX1RPX0RFVklDRSk7Cj4+PiArCWVsc2UKPj4+ICsJCUJVR19PTihkaXIgIT0gRE1B X0ZST01fREVWSUNFKTsKPj4+ICAgfQo+Pj4gICAKPj4+ICAgdm9pZCBzd2lvdGxiX3N5bmNfc2lu Z2xlX2Zvcl9jcHUoc3RydWN0IGRldmljZSAqZGV2LCBwaHlzX2FkZHJfdCB0bGJfYWRkciwKPj4+ Cj4+IAo+PiBXaXRoIHRoaXMgcGF0Y2ggdGhlIEFQIHdvcmtzIGZvciBtZS4KPgo+IENvb2wsIHRo YW5rcyBmb3IgY29uZmlybWluZy4gU28gSSB0aGluayBhdGg5ayBwcm9iYWJseSBpcyBkb2luZyAK PiBzb21ldGhpbmcgZG9kZ3kgd2l0aCBkbWFfc3luY18qKCksIGJ1dCBpZiBMaW51cyBwcmVmZXJz IHRvIG1ha2UgdGhlIAo+IGFib3ZlIGNoYW5nZSByYXRoZXIgdGhhbiB3YWl0IGZvciB0aGF0IHRv IGdldCBmaWd1cmVkIG91dCwgSSBiZWxpZXZlIAo+IHRoYXQgc2hvdWxkIGJlIGZpbmUuCgpJJ20g bG9va2luZyBpbnRvIHRoaXM7IGJ1dCBpbiB0aGUgaW50ZXJlc3Qgb2YgYSBzcGVlZHkgcmVzb2x1 dGlvbiBvZiB0aGUKcmVncmVzc2lvbiBJIHdvdWxkIGJlIGluIGZhdm91ciBvZiBtZXJnaW5nIHRo YXQgcGFydGlhbCByZXZlcnQgYW5kCnJlaW5zdGF0aW5nIGl0IGlmL3doZW4gd2UgaWRlbnRpZnkg KGFuZCBmaXgpIGFueSBidWdzIGluIGF0aDlrIDopCgotVG9rZQpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlz dHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3Jn L21haWxtYW4vbGlzdGluZm8vaW9tbXU=