From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: Re: [PATCH 2/2] i2c: sh_mobile: rework deferred probing Date: Wed, 17 Dec 2014 19:29:06 +0100 Message-ID: <20141217182905.GD3981@katana> References: <1418733086-26324-1-git-send-email-wsa@the-dreams.de> <1418733086-26324-3-git-send-email-wsa@the-dreams.de> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Xm/fll+QQv+hsKip" Return-path: Content-Disposition: inline In-Reply-To: <1418733086-26324-3-git-send-email-wsa@the-dreams.de> Sender: linux-sh-owner@vger.kernel.org To: linux-i2c@vger.kernel.org Cc: linux-sh@vger.kernel.org, Magnus Damm , Simon Horman , Laurent Pinchart , Geert Uytterhoeven , dmaengine@vger.kernel.org, Vinod Koul List-Id: linux-i2c@vger.kernel.org --Xm/fll+QQv+hsKip Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Dec 16, 2014 at 01:31:26PM +0100, Wolfram Sang wrote: > From: Wolfram Sang >=20 > DMA is opt-in for this driver. So, we can't use deferred probing for > requesting DMA channels in probe, because our driver would get endlessly > deferred if DMA support is compiled in AND the DMA driver is missing. > Because we can't know when the DMA driver might show up, we always try > again when a DMA transfer would be possible. The downside is that there > is more overhead for setting up PIO transfers under the above scenario. > But well, having DMA enabled and the proper DMA driver missing looks > like a broken or test config anyhow. >=20 > Reported-by: Geert Uytterhoeven > Signed-off-by: Wolfram Sang Applied to for-current, thanks! --Xm/fll+QQv+hsKip Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJUkctxAAoJEBQN5MwUoCm2y2IP+wZ5bw+HGMG8Zy9F5JNPU5T2 IPmrdf2sqd5+YDOj5oiZJO3yxco+8X/oBpGKY40hN/DAg7khq0Bx8RFf6QYjAeeY yjIzcNkK51V+3iNjv9TtESL/3R0z/lXL1Ex4xFC5AXvxDs9XKwKn1cvIYQSjXfu8 B3GmGQP2KEu7P+7ruo8/6CdkK/e03sd8v/iZQClmsYE4R6HznjlNuald2ARlID5z 4NGk+/QioidFq5vQ6GpHTYs8AIJ6R/w1xRLXG9HssCXK2Ji5JbtdoE7Mj9exDzuC Ynr92I3LC/KCCoI4CfhGW6xhJumHnjzkpyMp8IvdkfcJWkbNZS8ZDFBFn6wZ+agC J/xo11Fgs93p9MnT3U76mkfZryqNmMENTZypHmHoN3idWO5/fRQv8J2RK0xfgiGs 1FmXmyOiL4KpYKroEG9Kwti/+gLSvVZv6azZx2kSmRENDOr6Q/JRAdGiN5xHuOOi bPtKQG/GrM6KGkUHwUhklTS0oETv6Y2sy1VzIg6XFUqg7Cc4A/9qo4PVKeDRB0mp zaoQb75vnv0g0uQxG1RV70kdUVeXlVUorOr4WE4cECqpgY9oNfZWwa3QpZZ5ZR9n 46iK9J4EldRk60eYe/rH3rheJg/y3fnZe1yKJSJXdb6Hx06dvklAxSaqZQOi5fWb tHmwvJ8ypOwsSqT9qc9s =lDfV -----END PGP SIGNATURE----- --Xm/fll+QQv+hsKip--