From patchwork Mon Mar 21 16:30:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Pali_Roh=C3=A1r?= X-Patchwork-Id: 553709 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5DBB1C433FE for ; Mon, 21 Mar 2022 16:31:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350022AbiCUQco (ORCPT ); Mon, 21 Mar 2022 12:32:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351165AbiCUQch (ORCPT ); Mon, 21 Mar 2022 12:32:37 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 24C16F957F; Mon, 21 Mar 2022 09:31:11 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id B0EE5612F5; Mon, 21 Mar 2022 16:31:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6539C340F9; Mon, 21 Mar 2022 16:31:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1647880270; bh=oLh0/VBSUCblDOhHVjzy1tQ+2cNVbgrdWCBKnnqb0CA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ydb+/oIJa5h1SawT5gGwwGDXMJkjDhxO2MexA84GMrIXHOEzS9u42UOjShgm41ucT aODIvGXw4SgXQ0lomAIL/BCqJybUUPfCaZmTR4bHXHFQliNF8teUPltpHuREG2ET4k TKJXWXbGnVihiSMS6XFHdlGWCWkNnodHHz6/KJaI0Kvv4aMcy8QoxKROpKqR2B8zLI zblcWL5X/4CapDP65ycLpZapJ5GQi7QKTLBWbRAjZ8ZeNQSBRVTjMhKPuCHz3RWXBr bkG1sEMLCMXy2ZwP91SBbYyPWR14Q7dAoHK8WjfKunp3icTWSQmK8kfo+3m6JBmI+R PcL2FI0MbxxFQ== Received: by pali.im (Postfix) id 46142EF8; Mon, 21 Mar 2022 17:31:07 +0100 (CET) From: =?utf-8?q?Pali_Roh=C3=A1r?= To: Greg Kroah-Hartman , Jiri Slaby , Johan Hovold , =?utf-8?q?Marek_Beh=C3=BAn?= Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] serial: Fix support for UPF_SPD_* flags in serial drivers Date: Mon, 21 Mar 2022 17:30:55 +0100 Message-Id: <20220321163055.4058-4-pali@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220321163055.4058-1-pali@kernel.org> References: <20220321163055.4058-1-pali@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org Most serial drivers do not handle UPF_SPD_* flags correctly. They use uart_get_baud_rate() and uart_get_divisor() functions for retrieving baud rate and divisor which correctly handle UPF_SPD_* flags and set correct value to HW. But drivers do not propagate correct value to termios structure as they call just tty_termios_encode_baud_rate() function which completely ignores these UPF_SPD_* flags. So termios structure reported to userspace does not match to UPF_SPD_* flags which were used for configuring HW and also does not match ASYNC_SDP_* flags stored in serial_struct which are reported to userspace. Fix this issue by introducing a new function uart_set_baud_rate() which is wrapper around tty_termios_encode_baud_rate() and which handles those UPF_SPD_* flags correctly. Replace all calls of tty_termios_encode_baud_rate() function which take an argument from uart_get_baud_rate() function by this new function uart_set_baud_rate(). This ensures that serial drivers which are using uart_get_baud_rate() will correctly handle UPF_SPD_* flags. Signed-off-by: Pali Rohár --- drivers/tty/serial/21285.c | 2 +- drivers/tty/serial/8250/8250_mtk.c | 2 +- drivers/tty/serial/8250/8250_omap.c | 2 +- drivers/tty/serial/8250/8250_port.c | 2 +- drivers/tty/serial/altera_uart.c | 2 +- drivers/tty/serial/ar933x_uart.c | 2 +- drivers/tty/serial/arc_uart.c | 2 +- drivers/tty/serial/dz.c | 2 +- drivers/tty/serial/imx.c | 3 +- drivers/tty/serial/lantiq.c | 2 +- drivers/tty/serial/lpc32xx_hs.c | 2 +- drivers/tty/serial/men_z135_uart.c | 2 +- drivers/tty/serial/mps2-uart.c | 2 +- drivers/tty/serial/msm_serial.c | 2 +- drivers/tty/serial/mvebu-uart.c | 2 +- drivers/tty/serial/owl-uart.c | 2 +- drivers/tty/serial/pch_uart.c | 2 +- drivers/tty/serial/pic32_uart.c | 2 +- drivers/tty/serial/rda-uart.c | 2 +- drivers/tty/serial/rp2.c | 2 +- drivers/tty/serial/sccnxp.c | 2 +- drivers/tty/serial/serial-tegra.c | 2 +- drivers/tty/serial/serial_core.c | 51 +++++++++++++++++++++++++++++ drivers/tty/serial/sprd_serial.c | 2 +- drivers/tty/serial/timbuart.c | 2 +- drivers/tty/serial/vt8500_serial.c | 2 +- drivers/tty/serial/xilinx_uartps.c | 2 +- include/linux/serial_core.h | 2 ++ 28 files changed, 79 insertions(+), 27 deletions(-) diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c index 09baef4ccc39..4e4dbd58c581 100644 --- a/drivers/tty/serial/21285.c +++ b/drivers/tty/serial/21285.c @@ -265,7 +265,7 @@ serial21285_set_termios(struct uart_port *port, struct ktermios *termios, baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); quot = uart_get_divisor(port, baud); b = port->uartclk / (16 * quot); - tty_termios_encode_baud_rate(termios, b, b); + uart_set_baud_rate(port, termios, b); switch (termios->c_cflag & CSIZE) { case CS5: diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index fb65dc601b23..4a46a7f039d0 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -406,7 +406,7 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios, spin_unlock_irqrestore(&port->lock, flags); /* Don't rewrite B0 */ if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); } static int __maybe_unused mtk8250_runtime_suspend(struct device *dev) diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index 73e5f1dbd075..96c1df9ffd25 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -510,7 +510,7 @@ static void omap_8250_set_termios(struct uart_port *port, /* Don't rewrite B0 */ if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); } /* same as 8250 except that we may have extra flow bits set in EFR */ diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 5775cbff8f6e..05ca0152b932 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -2878,7 +2878,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, /* Don't rewrite B0 */ if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); } EXPORT_SYMBOL(serial8250_do_set_termios); diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c index 7c5f4e966b59..ec352d53662a 100644 --- a/drivers/tty/serial/altera_uart.c +++ b/drivers/tty/serial/altera_uart.c @@ -185,7 +185,7 @@ static void altera_uart_set_termios(struct uart_port *port, if (old) tty_termios_copy_hw(termios, old); - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); spin_lock_irqsave(&port->lock, flags); uart_update_timeout(port, termios->c_cflag, baud); diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index 4379ca4842ae..48e8127d0e9d 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -355,7 +355,7 @@ static void ar933x_uart_set_termios(struct uart_port *port, spin_unlock_irqrestore(&up->port.lock, flags); if (tty_termios_baud_rate(new)) - tty_termios_encode_baud_rate(new, baud, baud); + uart_set_baud_rate(port, new, baud); } static void ar933x_uart_rx_chars(struct ar933x_uart_port *up) diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c index 596217d10d5c..cc2a06832699 100644 --- a/drivers/tty/serial/arc_uart.c +++ b/drivers/tty/serial/arc_uart.c @@ -391,7 +391,7 @@ arc_serial_set_termios(struct uart_port *port, struct ktermios *new, /* Don't rewrite B0 */ if (tty_termios_baud_rate(new)) - tty_termios_encode_baud_rate(new, baud, baud); + uart_set_baud_rate(port, new, baud); uart_update_timeout(port, new->c_cflag, baud); diff --git a/drivers/tty/serial/dz.c b/drivers/tty/serial/dz.c index e9edabc5a211..8084966ba9f9 100644 --- a/drivers/tty/serial/dz.c +++ b/drivers/tty/serial/dz.c @@ -599,7 +599,7 @@ static void dz_set_termios(struct uart_port *uport, struct ktermios *termios, baud = 9600; bflag = DZ_B9600; } - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(uport, termios, baud); } cflag |= bflag; diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 90f82e6c54e4..b56344b46459 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1729,8 +1729,7 @@ imx_uart_set_termios(struct uart_port *port, struct ktermios *termios, tdiv64 = sport->port.uartclk; tdiv64 *= num; do_div(tdiv64, denom * 16 * div); - tty_termios_encode_baud_rate(termios, - (speed_t)tdiv64, (speed_t)tdiv64); + uart_set_baud_rate(port, termios, (speed_t)tdiv64); num -= 1; denom -= 1; diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c index 497b334bc845..38b2f7fa80ff 100644 --- a/drivers/tty/serial/lantiq.c +++ b/drivers/tty/serial/lantiq.c @@ -502,7 +502,7 @@ lqasc_set_termios(struct uart_port *port, /* Don't rewrite B0 */ if (tty_termios_baud_rate(new)) - tty_termios_encode_baud_rate(new, baud, baud); + uart_set_baud_rate(port, new, baud); uart_update_timeout(port, cflag, baud); } diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c index b199d7859961..e6f9166be0c7 100644 --- a/drivers/tty/serial/lpc32xx_hs.c +++ b/drivers/tty/serial/lpc32xx_hs.c @@ -530,7 +530,7 @@ static void serial_lpc32xx_set_termios(struct uart_port *port, /* Don't rewrite B0 */ if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); } static const char *serial_lpc32xx_type(struct uart_port *port) diff --git a/drivers/tty/serial/men_z135_uart.c b/drivers/tty/serial/men_z135_uart.c index 9acae5f8fc32..e3a83bca9991 100644 --- a/drivers/tty/serial/men_z135_uart.c +++ b/drivers/tty/serial/men_z135_uart.c @@ -713,7 +713,7 @@ static void men_z135_set_termios(struct uart_port *port, spin_lock_irq(&port->lock); if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); bd_reg = uart_freq / (4 * baud); iowrite32(bd_reg, port->membase + MEN_Z135_BAUD_REG); diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c index 587b42f754cb..117a7afcd088 100644 --- a/drivers/tty/serial/mps2-uart.c +++ b/drivers/tty/serial/mps2-uart.c @@ -383,7 +383,7 @@ mps2_uart_set_termios(struct uart_port *port, struct ktermios *termios, spin_unlock_irqrestore(&port->lock, flags); if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); } static const char *mps2_uart_type(struct uart_port *port) diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c index fcef7a961430..789dfeb286bf 100644 --- a/drivers/tty/serial/msm_serial.c +++ b/drivers/tty/serial/msm_serial.c @@ -1262,7 +1262,7 @@ static void msm_set_termios(struct uart_port *port, struct ktermios *termios, baud = uart_get_baud_rate(port, termios, old, 300, 4000000); baud = msm_set_baud_rate(port, baud, &flags); if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); /* calculate parity */ mr = msm_read(port, UART_MR2); diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c index ab226da75f7b..7bd9579855fa 100644 --- a/drivers/tty/serial/mvebu-uart.c +++ b/drivers/tty/serial/mvebu-uart.c @@ -515,7 +515,7 @@ static void mvebu_uart_set_termios(struct uart_port *port, baud = uart_get_baud_rate(port, old, NULL, min_baud, max_baud); } else { - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); uart_update_timeout(port, termios->c_cflag, baud); } diff --git a/drivers/tty/serial/owl-uart.c b/drivers/tty/serial/owl-uart.c index 91f1eb0058d7..8d70cdbd4a73 100644 --- a/drivers/tty/serial/owl-uart.c +++ b/drivers/tty/serial/owl-uart.c @@ -387,7 +387,7 @@ static void owl_uart_set_termios(struct uart_port *port, /* Don't rewrite B0 */ if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); port->read_status_mask |= OWL_UART_STAT_RXER; if (termios->c_iflag & INPCK) diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index f0351e6f0ef6..53f2e9c09d8d 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -1412,7 +1412,7 @@ static void pch_uart_set_termios(struct uart_port *port, pch_uart_set_mctrl(&priv->port, priv->port.mctrl); /* Don't rewrite B0 */ if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); out: spin_unlock(&port->lock); diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c index 0a12fb11e698..286045456a1c 100644 --- a/drivers/tty/serial/pic32_uart.c +++ b/drivers/tty/serial/pic32_uart.c @@ -596,7 +596,7 @@ static void pic32_uart_set_termios(struct uart_port *port, uart_update_timeout(port, new->c_cflag, baud); if (tty_termios_baud_rate(new)) - tty_termios_encode_baud_rate(new, baud, baud); + uart_set_baud_rate(port, termios, baud); /* enable uart */ pic32_uart_en_and_unmask(port); diff --git a/drivers/tty/serial/rda-uart.c b/drivers/tty/serial/rda-uart.c index d550d8fa2fab..c08c597cda86 100644 --- a/drivers/tty/serial/rda-uart.c +++ b/drivers/tty/serial/rda-uart.c @@ -318,7 +318,7 @@ static void rda_uart_set_termios(struct uart_port *port, /* Don't rewrite B0 */ if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); /* update the per-port timeout */ uart_update_timeout(port, termios->c_cflag, baud); diff --git a/drivers/tty/serial/rp2.c b/drivers/tty/serial/rp2.c index 6689d8add8f7..a12e9a97905b 100644 --- a/drivers/tty/serial/rp2.c +++ b/drivers/tty/serial/rp2.c @@ -382,7 +382,7 @@ static void rp2_uart_set_termios(struct uart_port *port, baud_div = uart_get_divisor(port, baud); if (tty_termios_baud_rate(new)) - tty_termios_encode_baud_rate(new, baud, baud); + uart_set_baud_rate(port, new, baud); spin_lock_irqsave(&port->lock, flags); diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c index 10cc16a71f26..141dc0ebb688 100644 --- a/drivers/tty/serial/sccnxp.c +++ b/drivers/tty/serial/sccnxp.c @@ -714,7 +714,7 @@ static void sccnxp_set_termios(struct uart_port *port, /* Report actual baudrate back to core */ if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); /* Enable RX & TX */ sccnxp_port_write(port, SCCNXP_CR_REG, CR_RX_ENABLE | CR_TX_ENABLE); diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index 45e2e4109acd..876aa57dbcd0 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -1360,7 +1360,7 @@ static void tegra_uart_set_termios(struct uart_port *u, return; } if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(u, termios, baud); spin_lock_irqsave(&u->lock, flags); /* Flow control */ diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 34e085a038fe..113db02be87e 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -477,6 +477,57 @@ uart_get_baud_rate(struct uart_port *port, struct ktermios *termios, EXPORT_SYMBOL(uart_get_baud_rate); +void +uart_set_baud_rate(struct uart_port *port, struct ktermios *termios, unsigned int baud) +{ + upf_t flags = port->flags & UPF_SPD_MASK; + unsigned int close = baud / 50; + unsigned int altbaud = 0; + + switch (flags) { + case UPF_SPD_HI: + altbaud = 57600; + break; + case UPF_SPD_VHI: + altbaud = 115200; + break; + case UPF_SPD_SHI: + altbaud = 230400; + break; + case UPF_SPD_WARP: + altbaud = 460800; + break; + } + + /* + * UPF_SPD_* port flags are in use when B38400 is set in termios. + * Let termios baudrate set to B38400 value when new baudrate is + * in 2% tolerance (same tolerance as in tty_termios_encode_baud_rate). + * For UPF_SPD_CUST flag it is required to be this function called with + * baud = 38400 and then real baudrate depends only on custom_divisor. + */ + if (tty_termios_baud_rate(termios) == 38400) { + if (altbaud && baud - close >= altbaud && baud + close <= altbaud) { + altbaud = baud; + baud = 38400; + } else if (flags == UPF_SPD_CUST && baud == 38400) { + /* See uart_update_timeout() about this calculation */ + altbaud = DIV_ROUND_CLOSEST(port->uartclk, 16 * port->custom_divisor); + } + } + + tty_termios_encode_baud_rate(termios, baud, baud); + + /* + * If UPF_SPD_* port flags are active and in use then store into + * TCGETS2 c_*speed fields real baudrate. + */ + if (baud == 38400 && altbaud) + termios->c_ispeed = termios->c_ospeed = altbaud; +} + +EXPORT_SYMBOL(uart_set_baud_rate); + /** * uart_get_divisor - return uart clock divisor * @port: uart_port structure describing the port. diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c index 9a7ae6384edf..17b0cadd31e6 100644 --- a/drivers/tty/serial/sprd_serial.c +++ b/drivers/tty/serial/sprd_serial.c @@ -867,7 +867,7 @@ static void sprd_set_termios(struct uart_port *port, /* Don't rewrite B0 */ if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); } static const char *sprd_type(struct uart_port *port) diff --git a/drivers/tty/serial/timbuart.c b/drivers/tty/serial/timbuart.c index 08941eabe7b1..c41377d218e7 100644 --- a/drivers/tty/serial/timbuart.c +++ b/drivers/tty/serial/timbuart.c @@ -294,7 +294,7 @@ static void timbuart_set_termios(struct uart_port *port, up initially */ if (old) tty_termios_copy_hw(termios, old); - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); spin_lock_irqsave(&port->lock, flags); iowrite8((u8)bindex, port->membase + TIMBUART_BAUDRATE); diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c index e15b2bf69904..2e5d9b52e478 100644 --- a/drivers/tty/serial/vt8500_serial.c +++ b/drivers/tty/serial/vt8500_serial.c @@ -369,7 +369,7 @@ static void vt8500_set_termios(struct uart_port *port, baud = uart_get_baud_rate(port, termios, old, 900, 921600); baud = vt8500_set_baud_rate(port, baud); if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); /* calculate parity */ lcr = vt8500_read(&vt8500_port->uart, VT8500_URLCR); diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index d5e243908d9f..300108c9ba7e 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -714,7 +714,7 @@ static void cdns_uart_set_termios(struct uart_port *port, baud = uart_get_baud_rate(port, termios, old, minbaud, maxbaud); baud = cdns_uart_set_baud_rate(port, baud); if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); + uart_set_baud_rate(port, termios, baud); /* Update the per-port timeout. */ uart_update_timeout(port, termios->c_cflag, baud); diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index c58cc142d23f..a0f736be5645 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -330,6 +330,8 @@ void uart_update_timeout(struct uart_port *port, unsigned int cflag, unsigned int uart_get_baud_rate(struct uart_port *port, struct ktermios *termios, struct ktermios *old, unsigned int min, unsigned int max); +void uart_set_baud_rate(struct uart_port *port, struct ktermios *termios, + unsigned int baud); unsigned int uart_get_divisor(struct uart_port *port, unsigned int baud); /* Base timer interval for polling */