From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 063CD14601C for ; Thu, 22 Feb 2024 17:26:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708622779; cv=none; b=abRT9jlCC52aisCOgMU/UV05HHaeKuTrbMEtuAz/s1mpcBcLmRb0qONUacm8QUQI957LaVK+y2yXQ6b010xxHRxjia6StwEPrw4xsx7LAsjRRwUktlpTwYk4DC02UqWkoblyLKgIWFFCkY7zinMhG3qMsaH4iRgJKa3Bi06y9Z0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708622779; c=relaxed/simple; bh=4oBd/jcdcTn6sTLsHm2plaxj5EggSNpv62XZRcbcdC4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KRZpqkp1DwVhwGulgPJQIRXGWVH9Gqcqr3J+9o+aPHU64/bqzXUd6qL44kV+veYoCnLAzJO+mVihUGO0d87D6YQm54CBbCx4z5mlHHIqeOUq14ErcaJs1iAWAgTf/0XPvUOBgjvHqobhgiSjt9i/tAgohL813V+beBGfoCljFxU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PYQYgpOY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PYQYgpOY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BBA0FC433F1; Thu, 22 Feb 2024 17:26:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708622778; bh=4oBd/jcdcTn6sTLsHm2plaxj5EggSNpv62XZRcbcdC4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=PYQYgpOYEB1gzr+62CNRu1z8EtL5WD516ue/5R72aVrWQiJ5kmM1sxgqut7NtrzHR ZHv4sMRb5tSjbrk2wqxhVFGlL2vq4q1F6sbPb4ED+sn/IrGrqhQzPrWewVAtFhkExX dGL0sqTJlHhDB3if/d5NYocbDNqt2idp8M4fg4hKV1IuHB6vmB/93GjIzMKAN2SPSO FzGY7+uez2ix1pXhAMPW+ggjiyLZVM2+OUeJkbbiGBHNfxnFk1c1larhlQa4aU+KGq juUKhmqDCeB4qc4EcPzpW42/QDt6BuD817e8DrUOUp9X7Ne9rjsNsnfbsPkoftu5hC Al25/oxD/DDbQ== Date: Thu, 22 Feb 2024 18:26:14 +0100 From: Wolfram Sang To: Hans Hu Cc: andi.shyti@kernel.org, linux-i2c@vger.kernel.org, cobechen@zhaoxin.com Subject: Re: [PATCH v7 4/6] i2c: wmt: fix a bug when thread blocked Message-ID: Mail-Followup-To: Wolfram Sang , Hans Hu , andi.shyti@kernel.org, linux-i2c@vger.kernel.org, cobechen@zhaoxin.com References: <439eb65d-88de-4e7f-9138-000aefc1c1e4@zhaoxin.com> Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="nkDJOaJ/HUCUjyOr" Content-Disposition: inline In-Reply-To: --nkDJOaJ/HUCUjyOr Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Feb 22, 2024 at 06:42:20PM +0800, Hans Hu wrote: >=20 > > > Thanks for your suggestion, the purpose of this approach is to > > > reduce the clock stretching caused by the system. Therefore, > > > I try to put almost all of the processing in the interrupt context. > > Well, I think per-msg handling in interrupt context is enough. The > > transfer (consisting of multiple messages) handling is usually best left > > in process context. > >=20 >=20 > OK, I understand now. If you need inspiration, check i2c-digicolor.c for a simple driver implementing it. --nkDJOaJ/HUCUjyOr Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmXXg7IACgkQFA3kzBSg Kbb8OQ//cXCnoG3DQUPIpKLIy0cKQWm22/Ukvc5IA+GWW8NtrzHshq2HUy3pd544 vWACHm/VOvqEmhGbUM0nkeLA5RRIs+/jH8IAE86z3aEP7KXuworzkzVB/7jCzKbv rXLDHoDQbbnn3G9vH7lV5AQYWd42jMD1XSgtwo/XCxQ6F3sqb6mBrbk3kUpJ2DjU EewSgKJHfO9LyzPspRl5SBNqh+BbGmxwipn17/zRSklX1KceXYmM8o+seEoGqn8v hBQ4ybWj8vSmBIoF/4BNRBHn2KZ43js5uSfqXmvEKUzlkh1ykwoRvd1sOqG06cVb 2Pp+9TGjlBTDWTJ5qsWjRoFv8g8XCjrO2woDzayJD5AYcg/EAcGwYpxu5CFpgx5w 14BYjadTwvwkkXcQAQmn0DGRB2uDy5CEbjqPKdci7HOQ4k1Etvd55RnAqBALTeZh qVF3top0EY6Vw9GtBCH/4XaUA0zgNfo5380zqGattZalU5zobpLkFvWoN3J40oZ8 5HvUK5VDm+nJPRURpZd9hZUV/8dhlqWh4ZGMFo/4Xtl2nWA3w40xfeVTz/9Wqwg4 6VEkDQcb90J9XzTiOQugc1ggFP7823Fvib8sV7W7/4gbEZcJT/ukdhhbUavpu2sY sZaltbeGwoCNwsif1tZcFl8hPsXkv4RtQJIICMPkrQkfGf3HQKo= =pXiO -----END PGP SIGNATURE----- --nkDJOaJ/HUCUjyOr--