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Wed, 21 Mar 2018 03:29:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=/3cvl8Dj6CeRBTZfzzzlBHM+JJYAyDXPY73/cCqd9tA=; b=YI8ciR2igwUtPNf7npJYbGMSmDlFMAJUGFZ6XgmsO4pSX2Wn0gFWTT0ZGSE/eGvQiBRi27qBZvw7qx7yWJ+EsB0v0S7mcaL6p3NQ+SLYq3GroJH46F34cY+O5tBIeVNlyYN0z/Mm6qrxoISBo6xFFmr2eZNEK1T1qrrPy0mOO+c= Received: from HE1PR0401MB2425.eurprd04.prod.outlook.com (10.168.33.22) by HE1PR0401MB2459.eurprd04.prod.outlook.com (10.168.147.19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.588.14; Wed, 21 Mar 2018 07:29:39 +0000 Received: from HE1PR0401MB2425.eurprd04.prod.outlook.com ([fe80::a409:1898:a18e:6e85]) by HE1PR0401MB2425.eurprd04.prod.outlook.com ([fe80::a409:1898:a18e:6e85%18]) with mapi id 15.20.0588.017; Wed, 21 Mar 2018 07:29:39 +0000 From: Nipun Gupta To: Bharat Bhushan , "robin.murphy@arm.com" , "hch@lst.de" , "linux@armlinux.org.uk" , "gregkh@linuxfoundation.org" , "m.szyprowski@samsung.com" CC: "bhelgaas@google.com" , "zajec5@gmail.com" , "andy.gross@linaro.org" , "david.brown@linaro.org" , "dan.j.williams@intel.com" , "vinod.koul@intel.com" , "thierry.reding@gmail.com" , "robh+dt@kernel.org" , "frowand.list@gmail.com" , "jarkko.sakkinen@linux.intel.com" , "rafael.j.wysocki@intel.com" , "dmitry.torokhov@gmail.com" , "johan@kernel.org" , "msuchanek@suse.de" , "linux-kernel@vger.kernel.org" , "iommu@lists.linux-foundation.org" , "linux-wireless@vger.kernel.org" , "linux-arm-msm@vger.kernel.org" , "linux-soc@vger.kernel.org" , "dmaengine@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , "linux-tegra@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-pci@vger.kernel.org" , Leo Li Subject: RE: [PATCH v2 1/2] dma-mapping: move dma configuration to bus infrastructure Thread-Topic: [PATCH v2 1/2] dma-mapping: move dma configuration to bus infrastructure Thread-Index: AQHTwOGuh4ghPV/yzkyrY/8xyV2sSKPaSBKAgAACAZA= Date: Wed, 21 Mar 2018 07:29:38 +0000 Message-ID: References: <1520868292-2479-1-git-send-email-nipun.gupta@nxp.com> <1521615323-4752-1-git-send-email-nipun.gupta@nxp.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [14.142.187.166] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;HE1PR0401MB2459;7:ylF548+7nkmOh0cJ32Do9cpF6TL3/KiscRlfNd5goJLJRBpxolJ4snZKH63Rl3n5BEfzKl3N1IMkQ+l5GT4zunRpXMwi5cThjjai/pY23NK9KUm3A1YqGnWK5UpJgdskyjfeHOSaXGAyAajl48GMQAkaa016mdkXQMHnywxsLDVH3C+XhBhEBdpPmOkL3kdByDSsYCbKDj/urVs1woeiAhXXzXkiejKmqZ57SRfbysaSlKKlJXT99oHK6PiNFC9N x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: e9eb292a-daf9-46d6-47d9-08d58efd817a x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(2017052603328)(7153060)(7193020);SRVR:HE1PR0401MB2459; 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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: U9ixWp02lw2wyaDrq937z6N/B9zs4NrK0pcrFWmoj0Qk6Hey1e9OWCnToeDiiUesGfZhfT18QzcUioYOjmbKNzxJm+CGaub676U1y/bWZI59Q/4CSYl5tMpXyaNbziDGSoWMVV7FJypBCzCAdE2O95wRHMNjLLUt7C/f9pWCfJnwnpD9HVudQXKmMetHsrSSoRf6gbdAHPMyvAxKvshqJha8Aw++pVC43hrbB8XwwWtVElU3wnQkZz9Yq6h3K4BFnxvf7iKViln3FxvXvyhcFa4Br3i2UxArrd8eXgcmaHMqp1eAdWILxSz9KPMrRotT7TSrCXTC1RR7F4w/4xnqVg== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: e9eb292a-daf9-46d6-47d9-08d58efd817a X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Mar 2018 07:29:39.0281 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR0401MB2459 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: Bharat Bhushan > Sent: Wednesday, March 21, 2018 12:49 > > > > +int dma_configure(struct device *dev) > > +{ > > + if (dev->bus->dma_configure) > > + return dev->bus->dma_configure(dev); >=20 > What if dma_common_configure() is called in case "bus->dma_configure" is > not defined? >=20 > Thanks > -Bharat I think it is cleaner for bus to call '/dma_common_configure/' rather than this been called implicitly, but Robin/Christoph can comment better on this. Thanks, Nipun