From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender4-of-o58.zoho.com (sender4-of-o58.zoho.com [136.143.188.58]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 08EBB177 for ; Sat, 7 Aug 2021 07:49:18 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; t=1628322557; cv=none; d=zohomail.com; s=zohoarc; b=l40szTu1hqq5GSEnEnPDR39vXkkYCRGMdLk8xp5+JtHQ3+Yy3/zsp88gQqSxs/2hOSbE/wXDz2+6+PYU4jZ86NLHdTuBXAd00FGvVZnBbBfk3a7hKcMwGmOM0ZuNmukpbDxwjUIG+oqyw89MveRKU2DL0dRudaAd58lQKVEExrU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1628322557; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:MIME-Version:Message-ID:Subject:To; bh=pnf0asVTLQ8twpx7JhDk1Ucgi+h2fh0K9avlTzvWVHQ=; b=bOU56hRDrmG/5ILkcYZ0GQwxYs499aUzabgYqrvzZpzoHnxXI/TG039U3zPolXSxYiZ2nXWojBlzpBqX+2u1MWIZWkA2rJVCmHJYekvbVoWLNUziDIGQ4osET6kS2eJ/vZbPvzFOmVg4p2w2P50//cfHtIopIWrHQ4F/PxsRxrQ= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=fnordco.com; spf=pass smtp.mailfrom=klaatu@fnordco.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1628322557; s=zoho; d=fnordco.com; i=jwoods@fnordco.com; h=Date:From:To:Cc:Message-ID:In-Reply-To:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding; bh=pnf0asVTLQ8twpx7JhDk1Ucgi+h2fh0K9avlTzvWVHQ=; b=LDo56lQpVhdsAn/33CwTeIHWKT3q0BdKuOXNFh7R3ah7F2yjAYBVchwXn9xVW+61 N1HJdiTX69aVVS1e3f119905TpTmlxibh3SNpuwUJW+Sv5g8LClAe1n7+zn4Xlh2r7S Q55dGoxnn9GXsMHKljfHnsBS4GuAoo+7p6AHM5c8= Received: from mail.zoho.com by mx.zohomail.com with SMTP id 1628322547718417.0875227115416; Sat, 7 Aug 2021 00:49:07 -0700 (PDT) Date: Sat, 07 Aug 2021 00:49:07 -0700 From: Jeff Woods To: "stable" Cc: "regressions" Message-ID: <17b1f9647ee.1179b6a05461889.5940365952430364689@fnordco.com> In-Reply-To: Subject: Kernel 5.13.6 breaks mmap with snd-hdsp module Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Importance: Medium User-Agent: Zoho Mail X-Mailer: Zoho Mail Specifically, commit c4824ae7db418aee6f50f308a20b832e58e997fd triggers the problem. Reverting this change restores functionality. The device is an RME Multiface II, using the snd-hdsp driver. Expected behavior: Device plays sound normally Exhibited behavior: When a program attempts to open the device, the following ALSA lib error happens: ALSA lib pcm_direct.c:1169:(snd1_pcm_direct_initialize_slave) slave plugin does not support mmap interleaved or mmap noninterleaved access This change hasn't affected my other computers with less esoteric hardware, so probably the problem lies with the snd-hdsp driver, but the device is unusable without reverting that commit. I am available to test any patches for this issue. Thanks, J Woods