Received: by 2002:ab2:3141:0:b0:1ed:23cc:44d1 with SMTP id i1csp1765377lqg; Mon, 4 Mar 2024 03:11:51 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCWsL+aNJOwYgDbl+qqAPZles8WW1vhdeB8l03lXKPbADSh5k3fjEODx0/B3X1cfp6luUSGjDfA+Rq50E5ix6CHblU6DfkWE22Vj3eyB8Q== X-Google-Smtp-Source: AGHT+IEHR2MVsjhwT0Oh37jkVH3mUvmQVwrJJc4pzUojT8MM5Nj3ERdMGuiYXLCYYS+dV6DbLlbb X-Received: by 2002:a05:6871:5cd:b0:220:10c3:15f2 with SMTP id v13-20020a05687105cd00b0022010c315f2mr10589493oan.57.1709550711694; Mon, 04 Mar 2024 03:11:51 -0800 (PST) Return-Path: Received: from ny.mirrors.kernel.org (ny.mirrors.kernel.org. [147.75.199.223]) by mx.google.com with ESMTPS id pe20-20020a05620a851400b00787d44599f0si9022857qkn.392.2024.03.04.03.11.50 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Mar 2024 03:11:51 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-90485-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223; Authentication-Results: mx.google.com; dkim=pass header.i=@nxp.com header.s=selector2 header.b=EgNa+tC0; arc=fail (signature failed); spf=pass (google.com: domain of linux-kernel+bounces-90485-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) smtp.mailfrom="linux-kernel+bounces-90485-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=nxp.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ny.mirrors.kernel.org (Postfix) with ESMTPS id 0F64B1C23302 for ; Mon, 4 Mar 2024 11:11:40 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id AD4DF38DF7; Mon, 4 Mar 2024 11:11:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=nxp.com header.i=@nxp.com header.b="EgNa+tC0" Received: from EUR05-AM6-obe.outbound.protection.outlook.com (mail-am6eur05on2055.outbound.protection.outlook.com [40.107.22.55]) (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 5F81246AD; Mon, 4 Mar 2024 11:11:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.22.55 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709550674; cv=fail; b=irRXFk632RhJ62BTCZTPo1VA2oD2WHM/F6F6XA6I1JJQ/z2SiynVyTIEwFc0uyctJSWPkQrSNYvZBx4Gc5taDpCaorD8ElBEuMcPmMLugFNwcd51HwuzATo335V4lSx8IHmdnRS7PBfgxzYFLePLl2Sgr9smS7Yb1/nt3frCnpo= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709550674; c=relaxed/simple; bh=+LHNtzM/ClSZEArj3a14WuxFd41a5PHEC4Axvn9wjCY=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: Content-Type:MIME-Version; b=hKEobQqsOsAYqhUJjhdaIyZGGZb2Tmh1NaLw+T4IuwROklcNv4Z+mYyvw+3gby50OcJCngMwfvzAe8dsvj73x7ZXtIgbmDF5BEwD2nA1WOaTjSKpVRpMgzh8JXJnm8hYMVO/J2JSaiGsLy99bUJu/R2EoDVfmlvaFmXh6pgtKKE= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com; spf=pass smtp.mailfrom=nxp.com; dkim=pass (1024-bit key) header.d=nxp.com header.i=@nxp.com header.b=EgNa+tC0; arc=fail smtp.client-ip=40.107.22.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nxp.com ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=nL4lsMznBAG6qg60zZAbhlCSAZ7i06xbkE5nEPSe07AcpmXqqg2DQ5Of7imtT/rBAvbGUQJo67UEQZLzZlqbhuTgQ/XlFOLGMp9ME7Z2tLtHR1RrOE5zKzvmTWnh/WVfEwGdPmCyCpJ5FMhyRCZt1k8UrffA4U/XU2BfTJFHGl6dDyfr7nM4cbVZ1ZUoyv/GFy6mn3QLWFqJ1GyKnTf3a1qc/MsPrdB2EwEaLWrZLalMws0EmeNnmd/UfFFtuG+bd8IqNSzHmo6B98n6XV83D4b5q9IgF86kVs0fizQCPD4QhZMy8zOgj9/kBgWv3GRCbSUTYhNRBUu/2QuKz0W3Fw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=+LHNtzM/ClSZEArj3a14WuxFd41a5PHEC4Axvn9wjCY=; b=Q6vhOPHjxHYWlz4nMFyosn+yvSGH5L+h2v6RBLSrJqKjhq+JbW0R71nFUAxxpdmJ1VSxIHJl21IR/H9z5VF3RFjp4/oPkY4/M6fFvUy34MyftUsvQ9iyKg52Lc5KfXirN9EAIUO9zD7PYx9c0nlUj+1u9bvxD84yKq6pDdCToK3izN/lgoObm4JC6ojYueQPhX4QuWQzU5eAmC2YtPkDDJ6WI4slFhQKMlSAdVgDd+npAnTa2SC1qFb14tsdkOxnFQO8+oA6T9HB2x0bYaNZGDd8v/asJUoAgQwlXtRPk6BcJwiSoCUclfaLECY0jmWN1N1hwYry5gmWQY7+I1CktA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=+LHNtzM/ClSZEArj3a14WuxFd41a5PHEC4Axvn9wjCY=; b=EgNa+tC0q2I7wYXv10DWqFGuspeMbwcgo++a0zJDpjw5rvJkn3nR/lGVGi+TA8CD+c4iy53BZ+VdUIIwnRKdanxOi/VpO8aWBt6QKfqGmvuX/iPUCaoYLhywVMFsVfhmB1HhSDNV3hR1y63qYFIYBMYeuLRaknu5WK/Imr9/NTc= Received: from AS8PR04MB8404.eurprd04.prod.outlook.com (2603:10a6:20b:3f8::7) by PA4PR04MB7677.eurprd04.prod.outlook.com (2603:10a6:102:eb::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7339.37; Mon, 4 Mar 2024 11:11:09 +0000 Received: from AS8PR04MB8404.eurprd04.prod.outlook.com ([fe80::643f:faca:24da:e9aa]) by AS8PR04MB8404.eurprd04.prod.outlook.com ([fe80::643f:faca:24da:e9aa%5]) with mapi id 15.20.7339.035; Mon, 4 Mar 2024 11:11:09 +0000 From: Sherry Sun To: Fabio Estevam CC: "Sverdlin, Alexander" , "u.kleine-koenig@pengutronix.de" , "gregkh@linuxfoundation.org" , "ilpo.jarvinen@linux.intel.com" , "robh@kernel.org" , Shenwei Wang , "tglx@linutronix.de" , "jirislaby@kernel.org" , "robert.hodaszi@digi.com" , "linux-serial@vger.kernel.org" , "imx@lists.linux.dev" , "linux-kernel@vger.kernel.org" , Frank Li Subject: RE: [PATCH] tty: serial: fsl_lpuart: avoid idle preamble pending if CTS is enabled Thread-Topic: [PATCH] tty: serial: fsl_lpuart: avoid idle preamble pending if CTS is enabled Thread-Index: AQHabder1X9YMJ50WEuZehMzhpFcmLEnKz4AgAAEAoCAAD4IAIAAADiw Date: Mon, 4 Mar 2024 11:11:09 +0000 Message-ID: References: <20240304020712.238637-1-sherry.sun@nxp.com> <2e1b1eae2e9d3cedcd270e35cfcf8086b914b7ff.camel@siemens.com> In-Reply-To: Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: AS8PR04MB8404:EE_|PA4PR04MB7677:EE_ x-ms-office365-filtering-correlation-id: 509b3c6a-6e71-4fad-a797-08dc3c3bcba3 x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AS8PR04MB8404.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(376005)(38070700009);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?utf-8?B?RWx1b3VvOGdIcW9BWDR3bjk0eXgxcmdFSmhjdFFnblRqVnR2V2dYM2dUeVRn?= =?utf-8?B?UmphbXRUZVpzekQ1VjRoWmZZOEp6Z2RrQnByMURrVEtoK2I1M01sSzVHak1u?= =?utf-8?B?NVN0bnNOdm1JVUZWSFN5RWZzYmNKUzJLaFhXV1RTSThEbmwyQk9kKzFnbTJo?= =?utf-8?B?c1BySUtWSzl2NlBVNlNFSXNlZ3l2UG1SU0YvRTUwN0dwZzVkQndBejI5TFpn?= =?utf-8?B?cXBIT2VFM09ZQWl1bDVkWkFFTE0zNDRGcng0c1M4amhJbG9zc1NTbXVldUpG?= =?utf-8?B?dzZINlBDYVhQWUkwa3RLQ0FoQStHbjZkcVpGYkMxUXFKdE5kZmhOTVE0bE5L?= =?utf-8?B?SlhUajQ0enYzam1NSUNNZDZiUGZyVW1zd3ZCTi96NGxFQjJEUzUrOENMMkt0?= =?utf-8?B?bnd5SGx5djEvQ1EzYkhpQU1WaFlwUFA4bXgrZkFRZWVLZHFpa29tWTFFSUJZ?= =?utf-8?B?aFBITzg2WjM5VDF6eGpzUnZBTUpLTXcxQlgzcWIzVjNUUG9NTDl4ZnJuMFl5?= =?utf-8?B?UXhSWlBsSERybjJLNzE1MEt0dGVkQ1FNL2R3dVNHdjZ6MDcydEdUMkFGTEdP?= =?utf-8?B?NHVWWjNhMWRSdm9oc1p4cHJxdStHaEJNeUhobWI5eEdmaWtvSCtoaHR4U0py?= =?utf-8?B?LzBRZXdVVlhlKy94d2NiQ01ubnVXbEw5YTdWVkhuOGhrYk9UcjJmSTM2Y1ZG?= =?utf-8?B?R3JnUXF4TGs4S1MvMXE0a0VHZ2N6YU1SQnE3KzA1U1NJS3JMeVQvdGpaN0Rp?= =?utf-8?B?a1ZxNjNiKytvTzEwc3FjUlExb1ZwOGt3T09ydGNoOFVTSWF3akxxYndlT0Iy?= =?utf-8?B?OTg3Z0x3RENJQUpza1ZjNjJuKzF2L0tQTGtmblFjNUhhejBrNjYweHFMRWw4?= =?utf-8?B?RGt5MVRPY2xma2RRazlFUitkRno4TTY4VnIzZWxXMlk3dEdPRW8vRmFlZVJJ?= =?utf-8?B?VHBxbktxT2NjelJwZDJ5ajNTNVNkaG1SdGNJUGVGbzhUZmZZdnZoZHM0aU1K?= =?utf-8?B?NDlWTndqZFB4ZjEvd1JrdUNCYzQzc0pnTDIrVDRMK0pLYWd6VWt1aVpHREVS?= =?utf-8?B?MjA0TkEzVkx4T0ZVdUtxTEtkY0l6NG9HK2hkVHdQM2FLalNsM3JjdVpkMm1t?= =?utf-8?B?d3VRT2JwNVk3SUhiTFFWYUF0WFg0ZkIwc1JyL3luVmhNZmNKZHlPYW1WbVBY?= =?utf-8?B?UDNaVkhSMHFRNi8raDROK2pvTWkrTmhtMFBjMm40SXpOMThvQXEyOUFvN0JS?= =?utf-8?B?NE5WbnhxUUh4dHkvb2p6TGdyZE1FUmJFK1J0ZGxqeVVKV0hPNjlxdUo1eXNz?= =?utf-8?B?MUFCRHdsbUdyNnlzcHFEYWMrd0tBeHBWUVcwanUrTVFDdFBFNlJXSUdrZm9j?= =?utf-8?B?amV1ZnRDZDc1b0ZicU5yM04wS2dNWkVZUFBnQTh1alJ2eUF0dDA0M2RTMkwz?= =?utf-8?B?c1JMMDF6VWNWZmVBNnVXa2RXdDhWclFOeVlwdFU2UG9DZkYzTFpqU21FUDN0?= =?utf-8?B?Nm5lVDd6WUpGZ0hTQ285VU1oN2MvakRYOUtib2NETko3aWR5aUQrM2dsTHhY?= =?utf-8?B?WFNmRWE2ck1rYVI3VnoyMVE3YXNUOE1QZGJYTmdOMHkrZ3Y3aVNZVTc3ZHNX?= =?utf-8?B?QWJqckg4eWZKK0pmb2J0cnZKTkYwNklRODFJKzNWOG52azFaZnV5WkZSb2g3?= =?utf-8?B?UjVydzkxZ2VvNDJXWHBNbGxrU2FuZjdFSjBVREdycU5ndlF3ZUhXKzFxRnNR?= =?utf-8?B?bXhNQzB3cnFkRExIQmpwV0JqM21FQ2pJQS8zSkRpNGNVNlk2KzZQeDNtQyti?= =?utf-8?B?dndJYkJLdmhNMGsxZ3ZsTVlWemlhMmNTZ29OVDMzWHlNbzRSNzE5bUVuRlg4?= =?utf-8?B?UHVINTZkR1hTOExqMFhuRTBmcHVaM2NMeHBPVWFOZ3BLUDBFQlI1cnBTUitq?= =?utf-8?B?VUpXNkNwMlNEdXc5LzdWZVNrSGxKZTVmTE1XaWMxc0o0N3dKU1RKc0p0UnpQ?= =?utf-8?B?VU5CSHc1MGQ4NFFzL3QyUDNXOTE0aUJrSDR1TjZ4TFdOc3lXbFdndHgzaU5v?= =?utf-8?B?ZDA1SjFoeTNzT0dzS0VueFA4ZnRIazUvaGhvZz09?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: AS8PR04MB8404.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 509b3c6a-6e71-4fad-a797-08dc3c3bcba3 X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Mar 2024 11:11:09.6694 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: PXU+39XIev8SsQ9tIcB6zM5tfBSIUt2o95+RIeZlB+M5eT2Vm/AyFz7rx/GyPAwhJe0h5aKAibl58xeV1eXwHQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA4PR04MB7677 DQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gRnJvbTogRmFiaW8gRXN0ZXZhbSA8 ZmVzdGV2YW1AZ21haWwuY29tPg0KPiBTZW50OiBNb25kYXksIE1hcmNoIDQsIDIwMjQgNzoxMCBQ TQ0KPiBUbzogU2hlcnJ5IFN1biA8c2hlcnJ5LnN1bkBueHAuY29tPg0KPiBDYzogU3ZlcmRsaW4s IEFsZXhhbmRlciA8YWxleGFuZGVyLnN2ZXJkbGluQHNpZW1lbnMuY29tPjsgdS5rbGVpbmUtDQo+ IGtvZW5pZ0BwZW5ndXRyb25peC5kZTsgZ3JlZ2toQGxpbnV4Zm91bmRhdGlvbi5vcmc7DQo+IGls cG8uamFydmluZW5AbGludXguaW50ZWwuY29tOyByb2JoQGtlcm5lbC5vcmc7IFNoZW53ZWkgV2Fu Zw0KPiA8c2hlbndlaS53YW5nQG54cC5jb20+OyB0Z2x4QGxpbnV0cm9uaXguZGU7IGppcmlzbGFi eUBrZXJuZWwub3JnOw0KPiByb2JlcnQuaG9kYXN6aUBkaWdpLmNvbTsgbGludXgtc2VyaWFsQHZn ZXIua2VybmVsLm9yZzsgaW14QGxpc3RzLmxpbnV4LmRldjsNCj4gbGludXgta2VybmVsQHZnZXIu a2VybmVsLm9yZzsgRnJhbmsgTGkgPGZyYW5rLmxpQG54cC5jb20+DQo+IFN1YmplY3Q6IFJlOiBb UEFUQ0hdIHR0eTogc2VyaWFsOiBmc2xfbHB1YXJ0OiBhdm9pZCBpZGxlIHByZWFtYmxlIHBlbmRp bmcgaWYgQ1RTDQo+IGlzIGVuYWJsZWQNCj4gDQo+IEhpIFNoZXJyeSwNCj4gDQo+IE9uIE1vbiwg TWFyIDQsIDIwMjQgYXQgNDozMuKAr0FNIFNoZXJyeSBTdW4gPHNoZXJyeS5zdW5AbnhwLmNvbT4g d3JvdGU6DQo+IA0KPiA+IEhpIEFsZXhhbmRlciwgZ29vZCBjYXRjaCwgSSB3aWxsIG1vdmUgdGhl ICIvKiByZXN0b3JlIGNvbnRyb2wgcmVnaXN0ZXIgKi8iDQo+IG1lc3NhZ2UgdG8gdGhlIGFwcHJv cHJpYXRlIHBsYWNlIGluIFYyLiBUaGFua3MhDQo+IA0KPiBQbGVhc2UgYWRkIGEgRml4ZXMgdGFn IGluIHYyLg0KDQpTdXJlLCB3aWxsIGFkZCwgdGhhbmtzIQ0KDQpCZXN0IFJlZ2FyZHMNClNoZXJy eQ0K