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linux/drivers/tty/serial
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Johan Hovold 2ac33975ab serial: qcom-geni: do not kill the machine on fifo underrun 
The Qualcomm GENI serial driver did not handle buffer flushing and used
to print discarded characters when the circular buffer was cleared.
Since commit 1788cf6a91 ("tty: serial: switch from circ_buf to kfifo")
this instead resulted in a hard lockup due to
qcom_geni_serial_send_chunk_fifo() spinning indefinitely in the
interrupt handler.

The underlying bugs have now been fixed, but make sure to output NUL
characters instead of killing the machine if a similar driver bug is
ever reintroduced.

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20240704101805.30612-4-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-07-04 12:30:30 +02:00
..
8250 serial: 8250_omap: Fix Errata i2310 with RX FIFO level check 2024-07-03 16:10:57 +02:00
jsm tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
21285.c serial: 21285: Use port lock wrappers 2023-09-18 11:18:08 +02:00
altera_jtaguart.c serial: altera_jtaguart: Convert to platform remove callback returning void 2023-11-23 19:12:30 +00:00
altera_uart.c tty/serial: altera_uart: use more informative labels in /proc/interrupts 2024-01-04 16:20:51 +01:00
amba-pl010.c serial: amba-pl010: Use port lock wrappers 2023-09-18 11:18:09 +02:00
amba-pl011.c serial: amba-pl011: move variable into CONFIG_DMA_ENGINE conditional 2024-04-09 17:07:10 +02:00
apbuart.c serial: apbuart: fix console prompt on qemu 2024-01-04 16:21:06 +01:00
apbuart.h
ar933x_uart.c serial: ar933x: Remove unneeded static structure 2024-04-09 17:07:10 +02:00
arc_uart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
atmel_serial.c tty: atmel_serial: use single DMA mapping for RX 2024-04-09 15:28:04 +02:00
atmel_serial.h
bcm63xx_uart.c serial: bcm63xx-uart: fix tx after conversion to uart_port_tx_limited() 2024-06-24 16:14:48 +02:00
clps711x.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
cpm_uart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
cpm_uart.h serial: cpm_uart: Remove cpm_uart/ subdirectory 2023-08-04 15:08:30 +02:00
digicolor-usart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
dz.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
dz.h
earlycon-riscv-sbi.c tty/serial: Add RISC-V SBI debug console based earlycon 2024-01-10 07:04:04 -08:00
earlycon-semihost.c serial: Rename earlycon semihost driver 2023-01-19 14:58:19 +01:00
earlycon.c earlycon: Let users set the clock frequency 2023-01-19 14:56:44 +01:00
esp32_acm.c serial: esp32_acm: Add explicit platform_device.h include 2023-12-15 14:20:00 +01:00
esp32_uart.c serial: esp32_uart: Use device_get_match_data() 2023-12-15 14:20:00 +01:00
fsl_linflexuart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
fsl_lpuart.c tty: serial: fsl_lpuart: use dev_err_probe for clocks 2024-04-17 13:14:04 +02:00
icom.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
imx_earlycon.c
imx.c serial: imx: ensure RTS signal is not left active after shutdown 2024-07-03 16:12:49 +02:00
ip22zilog.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
ip22zilog.h
Kconfig serial: sc16is7xx: re-add Kconfig SPI or I2C dependency 2024-06-04 14:10:28 +02:00
kgdb_nmi.c tty: make tty_operations::write()'s count size_t 2023-08-11 21:12:46 +02:00
kgdboc.c serial: kgdboc: Fix NMI-safety problems from keyboard reset code 2024-04-26 17:14:10 +01:00
lantiq.c serial: lantiq: Convert to platform remove callback returning void 2023-11-23 19:12:32 +00:00
liteuart.c serial: liteuart: Convert to platform remove callback returning void 2023-11-23 19:12:32 +00:00
lpc32xx_hs.c serial: lpc32xx_hs: Use uart_prepare_sysrq_char() to handle sysrq. 2024-03-02 22:06:21 +01:00
ma35d1_serial.c tty: serial: ma35d1: Add a NULL check for of_node 2024-07-03 16:12:06 +02:00
Makefile serial: sc16is7xx: rename Kconfig CONFIG_SERIAL_SC16IS7XX_CORE 2024-06-04 14:10:28 +02:00
max310x.c tty: serial: max310x: convert to use maple tree register cache 2024-04-09 16:50:36 +02:00
max3100.c serial: max3100: Convert to_max3100_port() to be static inline 2024-04-11 14:08:40 +02:00
mcf.c tty: mcf: MCF54418 has 10 UARTS 2024-06-24 16:13:05 +02:00
men_z135_uart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
meson_uart.c serial: meson+qcom: don't advance the kfifo twice 2024-04-16 09:05:43 +02:00
milbeaut_usio.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
mpc52xx_uart.c serial: mpc52xx: Convert to platform remove callback returning void 2023-11-23 19:12:32 +00:00
mps2-uart.c serial: mps2-uart: Use port lock wrappers 2023-09-18 11:18:12 +02:00
msm_serial.c serial: msm: check dma_map_sg() return value properly 2024-04-20 07:58:42 +02:00
mux.c
mvebu-uart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
mxs-auart.c Merge 6.9-rc5 into tty-next 2024-04-23 13:24:45 +02:00
omap-serial.c serial: omap: remove redundant assignment to variable tmout 2024-04-11 14:08:36 +02:00
owl-uart.c serial: owl: Use uart_prepare_sysrq_char() to handle sysrq. 2024-03-02 22:06:21 +01:00
pch_uart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
pic32_uart.c serial: pic32_uart: Replace of_gpio.h by proper one 2024-04-09 15:48:43 +02:00
pmac_zilog.c Merge 6.9-rc5 into tty-next 2024-04-23 13:24:45 +02:00
pmac_zilog.h
pxa.c serial: pxa: Use uart_prepare_sysrq_char(). 2024-03-02 22:06:21 +01:00
qcom_geni_serial.c serial: qcom-geni: do not kill the machine on fifo underrun 2024-07-04 12:30:30 +02:00
rda-uart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
rp2.c tty: rp2: remove unused rp2_uart_port::ignore_rx 2023-11-23 19:16:03 +00:00
sa1100.c serial: sa1100: Convert to platform remove callback returning void 2023-11-23 19:12:33 +00:00
samsung_tty.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
sb1250-duart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
sc16is7xx_i2c.c serial: sc16is7xx: split into core and I2C/SPI parts (sc16is7xx_regcfg) 2024-04-11 14:08:08 +02:00
sc16is7xx_spi.c serial: sc16is7xx: split into core and I2C/SPI parts (sc16is7xx_regcfg) 2024-04-11 14:08:08 +02:00
sc16is7xx.c TTY/Serial fixes for 6.10-rc1 2024-05-24 08:38:28 -07:00
sc16is7xx.h serial: sc16is7xx: split into core and I2C/SPI parts (sc16is7xx_regcfg) 2024-04-11 14:08:08 +02:00
sccnxp.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
serial_base_bus.c Revert "serial: core: Add support for DEVNAME:0.0 style naming for kernel console" 2024-06-25 07:58:00 +02:00
serial_base.h Revert "serial: core: Add support for DEVNAME:0.0 style naming for kernel console" 2024-06-25 07:58:00 +02:00
serial_core.c Revert "serial: core: Add support for DEVNAME:0.0 style naming for kernel console" 2024-06-25 07:58:00 +02:00
serial_ctrl.c serial: core: Start managing serial controllers to enable runtime PM 2023-05-31 10:46:59 +01:00
serial_mctrl_gpio.c serial: mctrl_gpio: Use port lock wrappers 2023-09-18 11:18:14 +02:00
serial_mctrl_gpio.h
serial_port.c serial: port: Don't block system suspend even if bytes are left to xmit 2024-06-04 14:09:47 +02:00
serial_txx9.c serial: txx9: Add missing #include <asm/txx9/generic.h> 2024-01-27 19:05:39 -08:00
serial-tegra.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
sh-sci.c serial: sh-sci: simplify locking when re-issuing RXDMA fails 2024-05-10 11:48:33 +01:00
sh-sci.h tty: serial: sh-sci: Add support for tx end interrupt handling 2023-04-20 13:47:33 +02:00
sifive.c serial: sifive: Remove 0 from fu540-c000-uart0 binding. 2024-04-09 15:48:46 +02:00
sprd_serial.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
st-asc.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
stm32-usart.c Merge 6.9-rc5 into tty-next 2024-04-23 13:24:45 +02:00
stm32-usart.h serial: stm32: get FIFO size from hwcfg register 2024-01-27 19:04:11 -08:00
suncore.c
sunhv.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
sunplus-uart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
sunsab.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
sunsab.h
sunsu.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
sunzilog.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
sunzilog.h
tegra-tcu.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
timbuart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
timbuart.h
uartlite.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
ucc_uart.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
vt8500_serial.c serial: vt8500: Use port lock wrappers 2023-09-18 11:18:16 +02:00
xilinx_uartps.c tty: serial: uartps: Add support for uartps controller reset 2024-05-04 18:11:05 +02:00
zs.c tty: serial: switch from circ_buf to kfifo 2024-04-09 15:28:03 +02:00
zs.h