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Mon, 5 Aug 2019 09:06:47 +0000 From: To: , , CC: , , , , Subject: Re: [PATCH v4 1/3] mtd: spi-nor: always use bounce buffer for register read/writes Thread-Topic: [PATCH v4 1/3] mtd: spi-nor: always use bounce buffer for register read/writes Thread-Index: AQHVSIVVg9Qji1Cq1EmeYAs+Xr0s4KbsSSOA Date: Mon, 5 Aug 2019 09:06:47 +0000 Message-ID: References: <20190801162229.28897-1-vigneshr@ti.com> <20190801162229.28897-2-vigneshr@ti.com> In-Reply-To: <20190801162229.28897-2-vigneshr@ti.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: VI1P18901CA0015.EURP189.PROD.OUTLOOK.COM (2603:10a6:801::25) To MN2PR11MB4448.namprd11.prod.outlook.com (2603:10b6:208:193::29) x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [94.177.32.154] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 783263b4-c7e8-4408-275b-08d719843e51 x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020);SRVR:MN2PR11MB4333; 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charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 783263b4-c7e8-4408-275b-08d719843e51 X-MS-Exchange-CrossTenant-originalarrivaltime: 05 Aug 2019 09:06:47.0896 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: tudor.ambarus@microchip.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR11MB4333 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DQoNCk9uIDA4LzAxLzIwMTkgMDc6MjIgUE0sIFZpZ25lc2ggUmFnaGF2ZW5kcmEgd3JvdGU6DQo+ IEV4dGVybmFsIEUtTWFpbA0KPiANCj4gDQo+IHNwaS1tZW0gbGF5ZXIgZXhwZWN0cyBhbGwgYnVm ZmVycyBwYXNzZWQgdG8gaXQgdG8gYmUgRE1BJ2FibGUuIEJ1dA0KPiBzcGktbm9yIGxheWVyIG1v c3RseSBhbGxvY2F0ZXMgYnVmZmVycyBvbiBzdGFjayBmb3IgcmVhZGluZy93cml0aW5nIHRvDQo+ IHJlZ2lzdGVycyBhbmQgdGhlcmVmb3JlIGFyZSBub3QgRE1BJ2FibGUuIEludHJvZHVjZSBib3Vu Y2UgYnVmZmVyIHRvIGJlDQo+IHVzZWQgdG8gcmVhZC93cml0ZSB0byByZWdpc3RlcnMuIFRoaXMg ZW5zdXJlcyB0aGF0IGJ1ZmZlciBwYXNzZWQgdG8NCj4gc3BpLW1lbSBsYXllciBkdXJpbmcgcmVn aXN0ZXIgcmVhZC93cml0ZXMgaXMgRE1BJ2FibGUuIFdpdGggdGhpcyBjaGFuZ2UNCj4gbm9yLT5j bWQtYnVmIGlzIG5vIGxvbmdlciB1c2VkLCBzbyBkcm9wIGl0Lg0KPiANCj4gUmV2aWV3ZWQtYnk6 IEJvcmlzIEJyZXppbGxvbiA8Ym9yaXMuYnJlemlsbG9uQGNvbGxhYm9yYS5jb20+DQo+IFNpZ25l ZC1vZmYtYnk6IFZpZ25lc2ggUmFnaGF2ZW5kcmEgPHZpZ25lc2hyQHRpLmNvbT4NCj4gLS0tDQo+ IA0KPiB2NDoNCj4gQXZvaWQgbWVtY3B5IGR1cmluZyBSRUFESUQNCj4gDQo+IHYzOiBuZXcgcGF0 Y2gNCj4gDQo+ICBkcml2ZXJzL210ZC9zcGktbm9yL3NwaS1ub3IuYyB8IDcwICsrKysrKysrKysr KysrKysrKysrLS0tLS0tLS0tLS0tLS0tDQo+ICBpbmNsdWRlL2xpbnV4L210ZC9zcGktbm9yLmgg ICB8ICA3ICsrKy0NCj4gIDIgZmlsZXMgY2hhbmdlZCwgNDUgaW5zZXJ0aW9ucygrKSwgMzIgZGVs ZXRpb25zKC0pDQo+IA0KPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9tdGQvc3BpLW5vci9zcGktbm9y LmMgYi9kcml2ZXJzL210ZC9zcGktbm9yL3NwaS1ub3IuYw0KPiBpbmRleCAwM2NjNzg4NTExZDUu LmUwMjM3NmUxMTI3YiAxMDA2NDQNCj4gLS0tIGEvZHJpdmVycy9tdGQvc3BpLW5vci9zcGktbm9y LmMNCj4gKysrIGIvZHJpdmVycy9tdGQvc3BpLW5vci9zcGktbm9yLmMNCg0KY3V0DQoNCj4gIC8q Kg0KPiBAQCAtMTQwNCw5ICsxNDAxLDExIEBAIHN0YXRpYyBpbnQgd3JpdGVfc3JfY3Ioc3RydWN0 IHNwaV9ub3IgKm5vciwgdTggKnNyX2NyKQ0KPiAgew0KPiAgCWludCByZXQ7DQo+ICANCj4gKwlt ZW1jcHkobm9yLT5ib3VuY2VidWYsIHNyX2NyLCAyKTsNCg0KSSdtIHRoaW5raW5nIG91dCBsb3Vk LiBUaGlzIGNhbiBiZSBhdm9pZGVkIGJ5IGZvcmNpbmcgYWxsIHRoZSBjYWxsZXJzIHRvIHVzZQ0K bm9yLT5ib3VuY2VidWYuIFRoYXQgd291bGQgcmVzdWx0IGluIGE6DQoNCnN0YXRpYyBpbnQgd3Jp dGVfc3Ioc3RydWN0IHNwaV9ub3IgKm5vciwgc2l6ZV90IGxlbikNCg0Kd3JpdGVfc3JfY3IoKSBj YW4gYmUgcmVtb3ZlZC4gTWVtY29weWluZyAyIGJ5dGVzIGlzIGEgc21hbGwgcHJpY2UgdG8gcGF5 LCB3ZSBjYW4NCmtlZXAgdGhpbmdzIGFzIHRoZXkgYXJlLCB0byBub3QgYmUgdG9vIGludmFzaXZl LiBCdXQgaWYgeW91IHRoaW5rIHRoYXQgdGhpcyBpZGVhDQppcyB3b3J0aCBpdCwgdGVsbC4NCg0K PiArDQo+ICAJd3JpdGVfZW5hYmxlKG5vcik7DQo+ICANCj4gLQlyZXQgPSBub3ItPndyaXRlX3Jl Zyhub3IsIFNQSU5PUl9PUF9XUlNSLCBzcl9jciwgMik7DQo+ICsJcmV0ID0gbm9yLT53cml0ZV9y ZWcobm9yLCBTUElOT1JfT1BfV1JTUiwgbm9yLT5ib3VuY2VidWYsIDIpOw0KPiAgCWlmIChyZXQg PCAwKSB7DQo+ICAJCWRldl9lcnIobm9yLT5kZXYsDQo+ICAJCQkiZXJyb3Igd2hpbGUgd3JpdGlu ZyBjb25maWd1cmF0aW9uIHJlZ2lzdGVyXG4iKTsNCg0KY3V0DQoNCj4gQEAgLTIxNzcsOSArMjE3 NiwxMCBAQCBzdGF0aWMgY29uc3Qgc3RydWN0IGZsYXNoX2luZm8gc3BpX25vcl9pZHNbXSA9IHsN Cj4gIHN0YXRpYyBjb25zdCBzdHJ1Y3QgZmxhc2hfaW5mbyAqc3BpX25vcl9yZWFkX2lkKHN0cnVj dCBzcGlfbm9yICpub3IpDQo+ICB7DQo+ICAJaW50CQkJdG1wOw0KPiAtCXU4CQkJaWRbU1BJX05P Ul9NQVhfSURfTEVOXTsNCj4gKwl1OAkJCSppZDsNCj4gIAljb25zdCBzdHJ1Y3QgZmxhc2hfaW5m bwkqaW5mbzsNCj4gIA0KPiArCWlkID0gbm9yLT5ib3VuY2VidWY7DQoNCm5pdDogZG8gaW5pdCBh dCBkZWNsYXJhdGlvbi4NCg0KQWxzbywgeW91IG1pc3NlZCBhIHBsYWNlIGluIHdoaWNoIHlvdSBj YW4gdXNlIHRoZSBib3VuY2VidWYsIHNlYXJjaCBieSAicmVhZF9yZWcoIjoNCnJldCA9IG5vci0+ cmVhZF9yZWcobm9yLCBTUElOT1JfT1BfWFJEU1IsICZ2YWwsIDEpOw0KDQpDaGVlcnMsDQp0YQ0K