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Mon, 27 Mar 2023 01:08:18 -0700 (PDT) Received: from [10.241.138.38] ([80.82.20.2]) by smtp.gmail.com with ESMTPSA id d16-20020a2eb050000000b0029aa0b6b41asm4382732ljl.115.2023.03.27.01.08.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Mar 2023 01:08:17 -0700 (PDT) Message-ID: <880126f0563aba70f713ce91981de027d86593b3.camel@gmail.com> Subject: Re: Regression: serial: imx: overrun errors on debug UART From: Tomasz =?UTF-8?Q?Mo=C5=84?= To: Stefan Wahren , Uwe =?ISO-8859-1?Q?Kleine-K=F6nig?= Cc: Fabio Estevam , Ilpo =?ISO-8859-1?Q?J=E4rvinen?= , Stefan Wahren , linux-serial@vger.kernel.org, Greg Kroah-Hartman , Sascha Hauer , Sergey Organov , NXP Linux Team , Pengutronix Kernel Team , Shawn Guo , Jiri Slaby , Tomasz =?UTF-8?Q?Mo=C5=84?= , Linux ARM Date: Mon, 27 Mar 2023 10:07:29 +0200 In-Reply-To: <07d37e3e-dfe2-9e6e-a981-8d3c6a9fc5f5@i2se.com> References: <2c29454b-9369-4360-8eb4-c151f59460cb@i2se.com> <9e22f237-f3ee-0415-9e6b-89a137769b8f@i2se.com> <5d59dec6-9f6f-7b20-1221-f57c94b29cca@i2se.com> <20230325151100.mskydt3hwbnspqp4@pengutronix.de> <07d37e3e-dfe2-9e6e-a981-8d3c6a9fc5f5@i2se.com> User-Agent: Evolution 3.46.4 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230327_010821_156659_B8FA4554 X-CRM114-Status: GOOD ( 19.51 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gU2F0LCAyMDIzLTAzLTI1IGF0IDE4OjA1ICswMTAwLCBTdGVmYW4gV2FocmVuIHdyb3RlOgo+ IEFtIDI1LjAzLjIzIHVtIDE2OjExIHNjaHJpZWIgVXdlIEtsZWluZS1Lw7ZuaWc6Cj4gPiBTbyBv biBhbiBVUCBzeXN0ZW0gdGhlIHByb2JsZW0gc2hvdWxkIG9jY3VyIGFsc28gb24gYSBub24tY29u c29sZSBwb3J0Pwo+IAo+IFRoaXMgaXMgbGVzcyBsaWtlbHksIGJlY2F1c2UgVUFSVCBhcHBsaWNh dGlvbnMgdXN1YWxseSBuZWVkIHNvbWUga2luZCBvZiAKPiBmbG93IGNvbnRyb2wgKGVpdGhlciBm cm9tIGhhcmR3YXJlIG9yIHByb3RvY29sIHNpZGUpLiBGb3IgYSBub24tY29uc29sZSAKPiBhcHBs aWNhdGlvbiB0aGUgcmVjZWl2ZXIgdXN1YWxseSB3YWl0IHVudGlsIHRoZSBlbmQgYW5kIHRoZW4g c3RhcnRzIHRvIAo+IHRyYW5zbWl0Lgo+IAo+IFN1cmUgeW91IGNhbiBmbG9vZCB0aGUgVUFSVCB3 aXRoIGNoYXJhY3RlcnMgYW5kIGl0J3Mgb25seSBhIHF1ZXN0aW9uIG9mIAo+IHRpbWUgdW50aWwg dGhlIFJYIEZJRk8gaXMgZnVsbCBhbmQgZGF0YSBnZXQgbG9zdC4gQnV0IGkgdGhpbmsgd2Ugc2hv dWxkIAo+IGZvY3VzIG9uIHRoZSByZWFsIHVzZSBjYXNlIGFuZCBkb24ndCB0cnkgZmluZCB0aGUg cGVyZmVjdCBzb2x1dGlvbi4gQXQgCj4gdGhlIGVuZCBpdCdzIGFsd2F5cyBhIGNvbXByb21pc2Ug YmV0d2VlbiBsYXRlbmN5IGFuZCB0aHJvdWdocHV0LgoKSWYgeW91IGVuYWJsZSBETUEgb24gdGhl IFVBUlQgdGhlbiB5b3UgYXJlIGV4dHJlbWVseSB1bmxpa2VseSB0byBoaXQKb3ZlcmZsb3cuIFRv IHNvbWUgZGVncmVlIHRoZSBETUEgY2FuIGJlIHNlZW4gYXMgImV4dGVuZGVkIiBSWCBGSUZPLgoK VW5mb3J0dW5hdGVseSBETUEgY2Fubm90IGJlIHVzZWQgZm9yIGlteCBjb25zb2xlIFVBUlQuCgo+ ID4gVGhhdCBtYWtlcyBtZSB3b25kZXIgaWYgdGhlIGVycm9yIGRvZXNuJ3QgcmVsYXRlIHRvIHRo ZSBVQVJUIGJlaW5nIGEKPiA+IGNvbnNvbGUgcG9ydCwgYnV0IHRoZSBVQVJUIGJlaW5nIHVzZWQg d2l0aG91dCBETUE/ISAoU28gdGhlIHBhdGNoIGFib3ZlCj4gPiBmaXhlcyB0aGUgcHJvYmxlbSBm b3IgeW91IGJlY2F1c2Ugb24gdGhlIGNvbnNvbGUgcG9ydCBubyBETUEgaXMgdXNlZD8pCj4gCj4g QXMgaSBzYWlkIHRoZSBpc3N1ZSBvbmx5IG9jY3VyZWQgb24gdGhlIGNvbnNvbGUuIE15IHByb2Js ZW0gaXMgdGhhdCB0aGUgCj4gb3RoZXIgVUFSVHMgb24gVGFycmFnb24gYXJlIHVzZWQgZm9yIFJT NDg1IHdoaWNoIG1lYW5zIHRoZXkgYXJlIGp1c3QgCj4gaGFsZiBkdXBsZXguCj4gCj4gQWNjb3Jk aW5nIHRvIHRoZXNlIGxpbmVzIGluIGlteC5jIERNQSBpcyBuZXZlciB1c2VkIGZvciBjb25zb2xl Ogo+IAo+ICAgIC8qIENhbiB3ZSBlbmFibGUgdGhlIERNQSBzdXBwb3J0PyAqLwo+ICAgIGlmICgh dWFydF9jb25zb2xlKHBvcnQpICYmIGlteF91YXJ0X2RtYV9pbml0KHNwb3J0KSA9PSAwKQo+ICAg ICAgZG1hX2lzX2luaXRlZCA9IDE7Cj4gCj4gQXQgdGhlIGVuZCB0aGUgcGF0Y2ggYWJvdmUgb25s eSByZXN0b3JlcyB0aGUgb2xkIGNvbnNvbGUgYmVoYXZpb3IsIGJ1dCAKPiBrZWVwIFRvbWFzeiBN b8WEJ3Mgb3B0aW1pemF0aW9uIGZvciBub24tY29uc29sZSAod2hpY2ggd2FzIGluZGVudGVkIGZv cikuCgpTZXR0aW5nIFJYVEwgdG8gMSBpcyBlc3NlbnRpYWxseSBtYWtpbmcgdGhlIGlycSByYWlz ZWQgYSBiaXQgZWFybGllciwKaS5lLiB3aGVuIHRoZSBSWCBGSUZPIGNhbiBob2xkIDMxIG1vcmUg Y2hhcmFjdGVycy4gV2l0aCBSWFRMIHNldCB0byA4CmFuZCBkYXRhIGJ1cnN0LCB0aGUgaXJxIGlz IHJhaXNlZCB3aGVuIFJYIEZJRk8gY2FuIGhvbGQgMjQgbW9yZQpjaGFyYWN0ZXJzLiBUaGVyZWZv cmUgd2l0aCBSWFRMIHNldCB0byAxIChpbnN0ZWFkIG9mIDgpIHRoZSBtYXhpbXVtCmFjY2VwdGFi bGUgUlggaW50ZXJydXB0IGxhdGVuY3kgKGkuZS4gYmVmb3JlIHlvdSBsb3NpbmcgaW5jb21pbmcK Y2hhcmFjdGVycykgaXMgNyBjaGFyYWN0ZXJzIHRpbWUgbG9uZ2VyLgoKQmVzdCBSZWdhcmRzLApU b21hc3ogTW/FhAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5p bmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8v bGludXgtYXJtLWtlcm5lbAo=