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 X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B7BFC47258 for ; Tue, 5 May 2020 11:23:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2A4D5206D7 for ; Tue, 5 May 2020 11:23:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588677824; bh=DL0zScj/vD4HUZu7ZjuIWMlO3dmCiCLSWm3gS0fslLU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=ht2Vt6kFo/FNOfnBgiCjRDti9HCYevMFDrqoKg9ncHXY4BdpvCExRD3DOMtJx/MW7 NceNJJ9+htN1OeiTB7hoKuy8APJ5XWmllymi3foMc5Bb2uUZnw5BCZDborXHlOtN45 B2d6aX64RibaipPX4YNbX3jP3FFb6HSDlWjh0QlA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728683AbgEELXn (ORCPT ); Tue, 5 May 2020 07:23:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:35542 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728233AbgEELXn (ORCPT ); Tue, 5 May 2020 07:23:43 -0400 Received: from localhost (fw-tnat.cambridge.arm.com [217.140.96.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0613F206B9; Tue, 5 May 2020 11:23:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588677822; bh=DL0zScj/vD4HUZu7ZjuIWMlO3dmCiCLSWm3gS0fslLU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=HaKjKh8DwRfQ7dxTSVgpGyrStgSwSos6CFY6S1GHOHDBkTFVjlznmIGuhUWcaOzEo U79svTYKdnSvgXqGglGyIhnzG8sInZdEzByTh1bb5uS2R7TZDkV4L1HFl4GJfSR3fe XXlNKJm8aqX1vLSak2cztJ+pg2943mhflAfSU55M= Date: Tue, 5 May 2020 12:23:39 +0100 From: Mark Brown To: Dilip Kota Cc: Daniel Schwierzeck , robh@kernel.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, hauke@hauke-m.de, andriy.shevchenko@intel.com, cheol.yong.kim@intel.com, chuanhua.lei@linux.intel.com, qi-ming.wu@intel.com Subject: Re: [PATCH 1/4] spi: lantiq: Synchronize interrupt handlers and transfers Message-ID: <20200505112339.GC5377@sirena.org.uk> References: <3bf88d24b9cad9f3df1da8ed65bf55c05693b0f2.1587702428.git.eswara.kota@linux.intel.com> <310ca761-e7ae-1192-99fd-a1960697806b@gmail.com> <46f31699-e781-ae33-3ee5-d51e6940ee43@linux.intel.com> <20200429121310.GH4201@sirena.org.uk> <28f6511e-fe85-a834-1652-fd70def9ca88@linux.intel.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="Bu8it7iiRSEf40bY" Content-Disposition: inline In-Reply-To: <28f6511e-fe85-a834-1652-fd70def9ca88@linux.intel.com> X-Cookie: Poverty begins at home. User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Bu8it7iiRSEf40bY Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, May 04, 2020 at 06:15:47PM +0800, Dilip Kota wrote: > On 4/29/2020 8:13 PM, Mark Brown wrote: > > > Workqueue has a higher chances of causing SPI transfers timedout. > > because...? > I just tried to get the history of removing workqueue in SPI driver, on > GRX500 (earlier chipset of LGM) the SPI transfers got timedout with > workqueues during regression testing. Once changed to threaded IRQs > transfers are working successfully. That doesn't really explain why though, it just explains what. --Bu8it7iiRSEf40bY Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl6xTLsACgkQJNaLcl1U h9DHMgf/aPi4uTtAR1hPXyPWjXGRdm0fnyj1tmL2P9wXWRg+T2JLycn95DS7eO7b hHsOVqARDBWCpBM+4dviis0DTExD1TaiuLp12Tl0qYwdPBUKBVlodYNYW22za9wV nB8lscg3UieLHMMJXZ70lBNpWAsxuCblKUy+VF5naMU3BIoTho/vY4tTnk8XAdYR a/H3cZbpv/TclAdnvdOfv8ZALLD5k8Cc5QF+GENIf1i8c5dGTs+9Zfakj5HhznPy hdbUQX7jnGMXnQvqenytxJG33PCSlfj5+3u2Y3DBU/G814PEdDqu2iuwt26PEf6F oOab46YmB8iPycZrWW+DNLDTyZ8csQ== =+ami -----END PGP SIGNATURE----- --Bu8it7iiRSEf40bY--