From: Sasha Levin <sashal@kernel.org> To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sasha Levin <sashal@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Erwan Le Ray <erwan.leray@st.com>, linux-serial@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 4.9 146/251] serial: stm32: fix transmit_chars when tx is stopped Date: Thu, 16 Jan 2020 12:34:55 -0500 Message-ID: <20200116173641.22137-106-sashal@kernel.org> (raw) In-Reply-To: <20200116173641.22137-1-sashal@kernel.org> From: Erwan Le Ray <erwan.leray@st.com> [ Upstream commit b83b957c91f68e53f0dc596e129e8305761f2a32 ] Disables the tx irq when the transmission is ended and updates stop_tx conditions for code cleanup. Fixes: 48a6092fb41f ("serial: stm32-usart: Add STM32 USART Driver") Signed-off-by: Erwan Le Ray <erwan.leray@st.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/tty/serial/stm32-usart.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index 033856287ca2..ea8b591dd46f 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -293,13 +293,8 @@ static void stm32_transmit_chars(struct uart_port *port) return; } - if (uart_tx_stopped(port)) { - stm32_stop_tx(port); - return; - } - - if (uart_circ_empty(xmit)) { - stm32_stop_tx(port); + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { + stm32_clr_bits(port, ofs->cr1, USART_CR1_TXEIE); return; } @@ -312,7 +307,7 @@ static void stm32_transmit_chars(struct uart_port *port) uart_write_wakeup(port); if (uart_circ_empty(xmit)) - stm32_stop_tx(port); + stm32_clr_bits(port, ofs->cr1, USART_CR1_TXEIE); } static irqreturn_t stm32_interrupt(int irq, void *ptr) -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply index Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-01-16 17:33 [PATCH AUTOSEL 4.9 041/251] media: s5p-jpeg: Correct step and max values for V4L2_CID_JPEG_RESTART_INTERVAL Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 043/251] ASoC: imx-sgtl5000: put of nodes if finding codec fails Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 046/251] clk: sunxi-ng: sun8i-a23: Enable PLL-MIPI LDOs when ungating it Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 050/251] ARM: dts: lpc32xx: add required clocks property to keypad device node Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 051/251] ARM: dts: lpc32xx: reparent keypad controller to SIC1 Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 052/251] ARM: dts: lpc32xx: fix ARM PrimeCell LCD controller variant Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 053/251] ARM: dts: lpc32xx: fix ARM PrimeCell LCD controller clocks property Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 054/251] ARM: dts: lpc32xx: phy3250: fix SD card regulator voltage Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 058/251] thermal: mediatek: fix register index error Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 085/251] clocksource/drivers/sun5i: Fail gracefully when clock rate is unavailable Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 086/251] clocksource/drivers/exynos_mct: Fix error path in timer resources initialization Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 087/251] mmc: sdhci-brcmstb: handle mmc_of_parse() errors during probe Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 088/251] ARM: 8847/1: pm: fix HYP/SVC mode mismatch when MCPM is used Sasha Levin 2020-01-16 17:33 ` [PATCH AUTOSEL 4.9 089/251] ARM: 8848/1: virt: Align GIC version check with arm64 counterpart Sasha Levin 2020-01-16 17:34 ` [PATCH AUTOSEL 4.9 104/251] ARM: OMAP2+: Fix potentially uninitialized return value for _setup_reset() Sasha Levin 2020-01-16 17:34 ` [PATCH AUTOSEL 4.9 110/251] soc/fsl/qe: Fix an error code in qe_pin_request() Sasha Levin 2020-01-16 17:34 ` [PATCH AUTOSEL 4.9 111/251] spi: bcm2835aux: fix driver to not allow 65535 (=-1) cs-gpios Sasha Levin 2020-01-16 17:34 ` [PATCH AUTOSEL 4.9 114/251] ARM: pxa: ssp: Fix "WARNING: invalid free of devm_ allocated data" Sasha Levin 2020-01-16 17:34 ` [PATCH AUTOSEL 4.9 118/251] ARM: dts: ls1021: Fix SGMII PCS link remaining down after PHY disconnect Sasha Levin 2020-01-16 17:34 ` [PATCH AUTOSEL 4.9 138/251] pwm: meson: Don't disable PWM when setting duty repeatedly Sasha Levin 2020-01-16 17:34 ` [PATCH AUTOSEL 4.9 139/251] ARM: riscpc: fix lack of keyboard interrupts after irq conversion Sasha Levin 2020-01-16 17:34 ` Sasha Levin [this message] 2020-01-16 17:35 ` [PATCH AUTOSEL 4.9 184/251] ASoC: sun4i-i2s: RX and TX counter registers are swapped Sasha Levin 2020-01-16 17:35 ` [PATCH AUTOSEL 4.9 205/251] net: stmmac: dwmac-meson8b: Fix signedness bug in probe Sasha Levin 2020-01-16 17:35 ` [PATCH AUTOSEL 4.9 207/251] net: ethernet: stmmac: Fix signedness bug in ipq806x_gmac_of_parse() Sasha Levin 2020-01-16 17:35 ` [PATCH AUTOSEL 4.9 210/251] net: stmmac: gmac4+: Not all Unicast addresses may be available Sasha Levin 2020-01-16 17:36 ` [PATCH AUTOSEL 4.9 214/251] net: stmmac: fix length of PTP clock's name string Sasha Levin 2020-01-16 17:36 ` [PATCH AUTOSEL 4.9 218/251] dmaengine: imx-sdma: fix size check for sdma script_number Sasha Levin 2020-01-16 17:36 ` [PATCH AUTOSEL 4.9 224/251] mt7601u: fix bbp version check in mt7601u_wait_bbp_ready Sasha Levin 2020-01-16 17:36 ` [PATCH AUTOSEL 4.9 229/251] spi: atmel: fix handling of cs_change set on non-last xfer Sasha Levin 2020-01-16 17:36 ` [PATCH AUTOSEL 4.9 232/251] clk: samsung: exynos5420: Preserve CPU clocks configuration during suspend/resume Sasha Levin 2020-01-16 17:36 ` [PATCH AUTOSEL 4.9 235/251] media: exynos4-is: Fix recursive locking in isp_video_release() Sasha Levin 2020-01-16 17:36 ` [PATCH AUTOSEL 4.9 240/251] tty: serial: imx: use the sg count from dma_map_sg Sasha Levin 2020-01-16 17:36 ` [PATCH AUTOSEL 4.9 249/251] arm64: dts: juno: Fix UART frequency Sasha Levin
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