Ruihong Luo 748c5ea8b8 serial: 8250_dw: Preserve original value of DLF register ...

Preserve the original value of the Divisor Latch Fraction (DLF) register.
When the DLF register is modified without preservation, it can disrupt
the baudrate settings established by firmware or bootloader, leading to
data corruption and the generation of unreadable or distorted characters.

Fixes: 701c5e73b2 ("serial: 8250_dw: add fractional divisor support")
Cc: stable <stable@kernel.org>
Signed-off-by: Ruihong Luo <colorsu1922@gmail.com>
Link: https://lore.kernel.org/stable/20230713004235.35904-1-colorsu1922%40gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230713004235.35904-1-colorsu1922@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2023-07-25 20:31:31 +02:00

..

8250_accent.c

…

8250_acorn.c

…

8250_alpha.c

serial: 8250: Move Alpha-specific quirk out of the core

2021-12-30 13:23:44 +01:00

8250_aspeed_vuart.c

serial: 8250: synchronize and annotate UART_IER access

2023-05-30 11:45:42 +01:00

8250_bcm2835aux.c

serial: 8250_bcm2835aux: Add missing clk_disable_unprepare()

2022-07-28 10:33:44 +02:00

8250_bcm7271.c

serial: 8250: lock port in startup() callbacks

2023-05-30 11:45:42 +01:00

8250_boca.c

…

8250_core.c

serial: core: Start managing serial controllers to enable runtime PM

2023-05-31 10:46:59 +01:00

8250_dfl.c

tty: serial: 8250: add DFL bus driver for Altera 16550.

2023-01-19 16:07:40 +01:00

8250_dma.c

serial: 8250_dma: Fix DMA Rx rearm race

2023-01-31 11:15:16 +01:00

8250_dw.c

serial: Make ->set_termios() old ktermios const

2022-08-30 14:22:35 +02:00

8250_dwlib.c

serial: 8250_dw: Preserve original value of DLF register

2023-07-25 20:31:31 +02:00

8250_dwlib.h

serial: Make ->set_termios() old ktermios const

2022-08-30 14:22:35 +02:00

8250_early.c

serial: 8250: RT288x/Au1xxx code away from core

2023-05-13 19:47:26 +09:00

8250_em.c

serial: 8250: Change dl_read/write to handle value as u32

2023-05-13 19:47:26 +09:00

8250_exar_st16c554.c

…

8250_exar.c

serial: 8250: lock port in startup() callbacks

2023-05-30 11:45:42 +01:00

8250_fintek.c

serial: Make ->set_termios() old ktermios const

2022-08-30 14:22:35 +02:00

8250_fourport.c

…

8250_fsl.c

serial: 8250: Apply FSL workarounds also without SERIAL_8250_CONSOLE

2023-06-13 12:27:05 +02:00

8250_hp300.c

…

8250_hub6.c

…

8250_ingenic.c

serial: 8250/ingenic: Add support for the JZ4750/JZ4755

2022-11-03 03:43:05 +01:00

8250_ioc3.c

…

8250_lpc18xx.c

serial: 8250: lpc18xx: Remove redundant sanity check for RS485 flags

2022-07-14 16:34:24 +02:00

8250_lpss.c

serial: 8250_lpss: Use 16B DMA burst with Elkhart Lake

2022-11-09 13:04:39 +01:00

8250_men_mcb.c

serial: 8250_men_mcb: Remove duplicate UAPI:serial_core inclusion

2022-09-01 15:59:36 +02:00

8250_mid.c

serial: Make ->set_termios() old ktermios const

2022-08-30 14:22:35 +02:00

8250_mtk.c

serial: 8250_mtk: Simplify clock sequencing and runtime PM

2023-06-06 14:43:13 +02:00

8250_of.c

serial: 8250: Apply FSL workarounds also without SERIAL_8250_CONSOLE

2023-06-13 12:27:05 +02:00

8250_omap.c

serial: 8250_omap: Use force_suspend and resume for system suspend

2023-06-15 12:20:49 +02:00

8250_parisc.c

parisc/serial: Rename 8250_gsc.c to 8250_parisc.c

2022-10-21 08:10:46 +02:00

8250_pci1xxxx.c

serial: 8250_pci1xxxx: Add power management functions to quad-uart driver

2023-02-08 13:10:15 +01:00

8250_pci.c

Revert "8250: add support for ASIX devices with a FIFO bug"

2023-06-21 17:55:53 +02:00

8250_pcilib.c

serial: 8250_pci: Add serial8250_pci_setup_port definition in 8250_pcilib.c

2023-02-08 13:10:15 +01:00

8250_pcilib.h

serial: 8250_pci: Add serial8250_pci_setup_port definition in 8250_pcilib.c

2023-02-08 13:10:15 +01:00

8250_pericom.c

serial: 8250_pericom: Use UART_LCR_DLAB

2022-06-27 14:33:15 +02:00

8250_pnp.c

serial: 8250: remove duplicated BRI0A49 and BDP3336 entries

2021-09-22 16:59:13 +02:00

8250_port.c

Revert "8250: add support for ASIX devices with a FIFO bug"

2023-06-21 17:55:53 +02:00

8250_pxa.c

serial: 8250: Change dl_read/write to handle value as u32

2023-05-13 19:47:26 +09:00

8250_rt288x.c

serial: 8250_rt288x: Remove unnecessary UART_REG_UNMAPPED

2023-05-13 19:47:26 +09:00

8250_tegra.c

serial: 8250_tegra: Fix an error handling path in tegra_uart_probe()

2023-05-30 12:24:07 +01:00

8250_uniphier.c

serial: 8250: Change dl_read/write to handle value as u32

2023-05-13 19:47:26 +09:00

8250.h

Revert "8250: add support for ASIX devices with a FIFO bug"

2023-06-21 17:55:53 +02:00

Kconfig

serial: 8250: Apply FSL workarounds also without SERIAL_8250_CONSOLE

2023-06-13 12:27:05 +02:00

Makefile

serial: 8250: RT288x/Au1xxx code away from core

2023-05-13 19:47:26 +09:00

serial_cs.c

serial_cs: Add Option International GSM-Ready 56K/ISDN modem

2021-06-16 09:20:29 +02:00