From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.zeus03.de (zeus03.de [194.117.254.33]) (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 9FC5B4E0B93 for ; Fri, 9 Oct 2026 13:40:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.117.254.33 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791553273; cv=none; b=tSuLo19wUgguYNU4zqZhPcwVND4NOfT5OrA6uKYJVBxzRQ2u4BUnsZBHF3IddWrd6bOY3/m5qsKT+d8PqpCmmPOfP3NHENsPDw3LGIrym+V2CeyXlSjLMO7OfUBxjzTEsk1HABmTWXsrGydqup25pXl5il7QLpuSN+z4ia9e0XQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791553273; c=relaxed/simple; bh=wkHlt8+rosU40H08aV1VWYqgPcfGbNWcxFh8fLQWhQo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=myjvLRDDgOG0WlspvwdHzSKf2nfNxPgJYhSGbSCgvDd/qD0tYh6vx/8td60m91kbKe2g7RUHbB6QwP69hzfzav8YP3Q+OAiQg9fa9puycll63ZjJC9D6T92FaxIoTZ+qB6L6YtvXFlbu0zHUFrk7WNIkWiFgTOZ+GKzpryKEEDA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com; spf=pass smtp.mailfrom=sang-engineering.com; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b=EI8BF8oZ; arc=none smtp.client-ip=194.117.254.33 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b="EI8BF8oZ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= sang-engineering.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:in-reply-to; s=k1; bh=wkHl t8+rosU40H08aV1VWYqgPcfGbNWcxFh8fLQWhQo=; b=EI8BF8oZAci7vEYY0+wn Nztw9gt1i3Uiutz3WWLbOjpdAwPWzyENcom2rbppeLVGsQ3s2GxLDRbHR3u0KH/Y N3Hr15FsPSk0vPh4a1wdYDijOrygXdYY778+CyT/TLmF7WFBM54y6eHPV4RGliSQ 4BFMRPzZ9rz7+i+DllTuZBJ3CbbLDsko+Ao2A9TnO2Hn5wgkwvSnkxU2bw7YVEiH +yHJ0JGbPfm5yZTnNTwlkzpvf1xhprZy8uO52zgNTbDmWDTZ/23Rbs1OQsSxUHbm uMFByk6flLHhFruKGWcqW1vcuQhLqwBh0r7A1gDdGA/uJb4d29ApPT1xWOkK9rl/ nA== Received: (qmail 1206804 invoked from network); 9 Oct 2026 15:40:57 +0200 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 9 Oct 2026 15:40:57 +0200 X-UD-Smtp-Session: l3s3148p1@WCd7f2hdCO3Desiu Date: Fri, 9 Oct 2026 15:40:57 +0200 From: Wolfram Sang To: Vinod Koul Cc: dmaengine@vger.kernel.org, Frank Li , Koichiro Den Subject: Re: [PATCH] docs: dmaengine: clarify ordering rules around cookie completion Message-ID: References: <20261009093745.539924-1-vkoul@kernel.org> Precedence: bulk X-Mailing-List: dmaengine@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="5WETxe7mqkSjZbOz" Content-Disposition: inline In-Reply-To: <20261009093745.539924-1-vkoul@kernel.org> --5WETxe7mqkSjZbOz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Oct 09, 2026 at 11:37:44AM +0200, Vinod Koul wrote: > Sashiko pointed in [1] about the cookie completion order. It is good to > Document that for ensuring that dma buffer is flushed and no stale data > is seeing by consumer, we need to make sure such action is taken before > drivers invoke dma cookie completion. >=20 > [1]: https://lore.kernel.org/r/20260917072507.5BDB61F000FF@smtp.kernel.org >=20 > Signed-off-by: Vinod Koul Reviewed-by: Wolfram Sang --5WETxe7mqkSjZbOz Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmrI7ugACgkQFA3kzBSg KbbVJg/5AaUp/Eu8TwbqSUGdF7onO3Q5JstaGxeA/ds/uv24RG6GTvvJYEMvO8ga 6J2u/17+87wr4ut7hdLmNvt2tb1wxghysRzzyUdgNvJXWWmzQRh+lVLD9J8dv6r9 Y4M9qUWQm6eTkLMbTmJf21dJ8GvePPs3vVnOjz5JaifwlNrE0ZGqmJEXe9T6YLJl yIsp4surcyB5oPYXpmdzeDSBcvQvVA/SkuAXXJTJgF1dQJnP/Xft5JsPyTpi1xGe +tfJ7/j1VrubuOzyJjKLG7XCHfPHjhMHdHGKcbn0Ix2NWfxBffCD5ukUOHV8glv0 RSWZIWow5X2+ogkjYVmI5IqRczBBNHLJBV4Vx3kqWZI+uaqbWPLdMigPDoMxy4Vc CEXt218fszxoVTiJ/dWRg/lOne7HnS3g9p5CskF703IXxCSYRI2pcdk3kxixbcJi c/m0fOyCmwRVDq+7H0uDuhGbyzaLDfBx2T/qluPUbIWJJ57ZhRqzoqIQEovt+lrG cEusRkGAOVQd7mhAK8gxQXcM6HZ7biAJoymd6COyjzhKg5AMnGmWRZ8JJtkhlkdH E9AesnurdvxsEOp3u1ICDeCGYkVjT95Zc15BUvxJkHbzILgTv+VTFRdERPuKNQSe Phtp6Nnp1xhnMabbtvzt5rOHFUOX6ZAwyqkum+vo8ZNYGO3LjB0= =mree -----END PGP SIGNATURE----- --5WETxe7mqkSjZbOz--