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bh=M7X/MJKp8/PIf82tpGKdqdN3yg6js2Df5FS4DxXoRgs=; b=OlSgX/mL/kIq+Jd1x5XegL/5a8LHqMQiMB+c6T9GpjqJmGpSMEtlf1/18VU2SuCPUGYgz9jLJTye1O/uQU0mN715HKJ58MAu8QxyU7xKgohsYmQeclRtbkr5yqKJOrkxViM8kHybUudjf0bcnngFwNqYUX1KMrPnCLx7tm6IgwU1it/02G4O5hasFYjqf33V3v/jqwPLGmpLMk39xlbGtIiq2FlSf7A/McetEv4H65/Fbaxzuuusgr8tqEZJ58MFlNwAYfFIyk34V8cEFTc5SL1D87acJcikgmmHa2Obx1IMOXtW8407kScFTyXmF4F/ZH4wAhz0/VNoi3iA7dgLFw== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=oss.nxp.com; Received: from PA4PR04MB9224.eurprd04.prod.outlook.com (2603:10a6:102:2a3::5) by AS8PR04MB8181.eurprd04.prod.outlook.com (2603:10a6:20b:3f5::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9632.13; Wed, 18 Feb 2026 11:59:07 +0000 Received: from PA4PR04MB9224.eurprd04.prod.outlook.com ([fe80::8e54:4d38:df79:fd63]) by PA4PR04MB9224.eurprd04.prod.outlook.com ([fe80::8e54:4d38:df79:fd63%7]) with mapi id 15.20.9632.010; Wed, 18 Feb 2026 11:59:07 +0000 Message-ID: <0c02809d-2108-4261-ae36-c68cc7a169e1@oss.nxp.com> Date: Wed, 18 Feb 2026 13:58:58 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 01/13] serial: linflexuart: Fix locking in set_termios To: Frank Li Cc: gregkh@linuxfoundation.org, jirislaby@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, sumit.semwal@linaro.org, christian.koenig@amd.com, chester62515@gmail.com, cosmin.stoica@nxp.com, adrian.nitu@freescale.com, stefan-gabriel.mirea@nxp.com, Mihaela.Martinas@freescale.com, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, devicetree@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, s32@nxp.com, imx@lists.linux.dev, clizzi@redhat.com, aruizrui@redhat.com, eballetb@redhat.com, echanude@redhat.com, jkangas@redhat.com, Radu Pirea References: <20260216150205.212318-1-larisa.grigore@oss.nxp.com> <20260216150205.212318-2-larisa.grigore@oss.nxp.com> Content-Language: en-US From: Larisa Ileana Grigore In-Reply-To: Content-Type: text/plain; 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This change was made to not let anyone send characters (for example calling `linflex_console_putchar`) while LINFlexD is entering INIT mode. The INIT mode is entered when setting LINFLEXD_LINCR1_INIT in LINCR1. UARTCR should also be protected with a lock since it can be modified from different other places. I will update the commit description. Regards, Larisa >> >> Fixes: 09864c1cdf5c ("tty: serial: Add linflexuart driver for S32V234") >> Signed-off-by: Radu Pirea >> Signed-off-by: Larisa Grigore >> --- >> drivers/tty/serial/fsl_linflexuart.c | 4 ++-- >> 1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/tty/serial/fsl_linflexuart.c b/drivers/tty/serial/fsl_linflexuart.c >> index e70a56de1fce..5a410e2d56ac 100644 >> --- a/drivers/tty/serial/fsl_linflexuart.c >> +++ b/drivers/tty/serial/fsl_linflexuart.c >> @@ -407,6 +407,8 @@ linflex_set_termios(struct uart_port *port, struct ktermios *termios, >> unsigned long cr, old_cr, cr1; >> unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8; >> >> + uart_port_lock_irqsave(port, &flags); >> + >> cr = readl(port->membase + UARTCR); >> old_cr = cr; >> >> @@ -475,8 +477,6 @@ linflex_set_termios(struct uart_port *port, struct ktermios *termios, >> cr &= ~LINFLEXD_UARTCR_PCE; >> } >> >> - uart_port_lock_irqsave(port, &flags); >> - >> port->read_status_mask = 0; >> >> if (termios->c_iflag & INPCK) >> -- >> 2.47.0 >>