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Fri, 20 Jun 2025 11:05:11 +0200 Message-ID: Date: Fri, 20 Jun 2025 11:05:07 +0200 Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] serial: imx: Restore original RXTL for console to fix data loss To: Fabio Estevam , gregkh@linuxfoundation.org Cc: shawnguo@kernel.org, kernel@pengutronix.de, tomasz.mon@camlingroup.com, linux-serial@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, stable@vger.kernel.org References: <20250619114617.2791939-1-festevam@gmail.com> Content-Language: en-US From: Stefan Wahren Autocrypt: addr=wahrenst@gmx.net; keydata= xjMEZ1dOJBYJKwYBBAHaRw8BAQdA7H2MMG3q8FV7kAPko5vOAeaa4UA1I0hMgga1j5iYTTvN IFN0ZWZhbiBXYWhyZW4gPHdhaHJlbnN0QGdteC5uZXQ+wo8EExYIADcWIQT3FXg+ApsOhPDN NNFuwvLLwiAwigUCZ1dOJAUJB4TOAAIbAwQLCQgHBRUICQoLBRYCAwEAAAoJEG7C8svCIDCK JQ4BAP4Y9uuHAxbAhHSQf6UZ+hl5BDznsZVBJvH8cZe2dSZ6AQCNgoc1Lxw1tvPscuC1Jd1C TZomrGfQI47OiiJ3vGktBc44BGdXTiQSCisGAQQBl1UBBQEBB0B5M0B2E2XxySUQhU6emMYx f5QR/BrEK0hs3bLT6Hb9WgMBCAfCfgQYFggAJhYhBPcVeD4Cmw6E8M000W7C8svCIDCKBQJn V04kBQkHhM4AAhsMAAoJEG7C8svCIDCKJxoA/i+kqD5bphZEucrJHw77ujnOQbiKY2rLb0pE aHMQoiECAQDVbj827W1Yai/0XEABIr8Ci6a+/qZ8Vz6MZzL5GJosAA== In-Reply-To: <20250619114617.2791939-1-festevam@gmail.com> Content-Type: text/plain; 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The issue can be > reproduced with the following steps: > > - Open vi on the board. > - Paste a text file (~150 characters). > - Save the file, then repeat the process. > - Compare the sha256sum of the saved files. > > The checksums do not match due to missing characters or entire lines. > > Fix this by restoring the RXTL value to 1 when the UART is used as a > console. > > This ensures timely RX interrupts and reliable data reception in console > mode. > > With this change, pasted content is saved correctly, and checksums are > always consistent. > > Cc: stable@vger.kernel.org > Fixes: 7a637784d517 ("serial: imx: reduce RX interrupt frequency") > Signed-off-by: Fabio Estevam > Reviewed-by: Stefan Wahren Thanks