AuxXxilium/linux_dsm_epyc7002
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4c4fc90964
linux_dsm_epyc7002/drivers/tty/serial
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Ard Biesheuvel 4c4fc90964 drivers/tty: 8250: only call fintek_8250_probe when doing port I/O 
Commit fa01e2ca9f ("serial: 8250: Integrate Fintek into 8250_base")
modified the probing logic for PNP0501 devices, to remove a collision
between the generic 16550A driver and the Fintek driver, which reused
the same ACPI _HID.

The Fintek device probe is now incorporated into the common 8250 probe
path, and gets called for all discovered 16550A compatible devices,
including ones that are MMIO mapped rather than IO mapped. However,
the Fintek driver assumes the port base is a I/O address, and proceeds
to probe some arbitrary offsets above it.

This is generally a wrong thing to do, but on ARM systems (having no
native port I/O), this may result in faulting accesses of completely
unrelated MMIO regions in the PCI I/O space. Given that this is at
serial probe time, this results in hard to diagnose crashes at boot.

So let's restrict the Fintek probe to devices that we know are using
port I/O in the first place.

Fixes: fa01e2ca9f ("serial: 8250: Integrate Fintek into 8250_base")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Ricardo Ribalda <ricardo.ribalda@gmail.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-18 16:39:10 +02:00
..
8250 drivers/tty: 8250: only call fintek_8250_probe when doing port I/O 2017-05-18 16:39:10 +02:00
cpm_uart tty: serial: cpm_uart: make use of for_each_node_by_type() 2017-02-03 10:12:16 +01:00
jsm tty: serial: jsm_tty: constify uart_ops structures 2016-09-02 15:01:16 +02:00
21285.c
altera_jtaguart.c serial: altera_jtaguart: add earlycon support 2017-03-17 14:14:00 +09:00
altera_uart.c serial: altera_uart: add earlycon support 2017-03-31 16:56:10 +02:00
amba-pl010.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
amba-pl011.c tty: pl011: use "qdf2400_e44" as the earlycon name for QDF2400 E44 2017-04-18 17:47:42 +02:00
amba-pl011.h tty: amba-pl011: clean up LCR register offsets 2015-12-13 19:59:48 -08:00
apbuart.c
apbuart.h
ar933x_uart.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
arc_uart.c serial/arc: constify uart_ops structures 2016-09-01 21:05:41 +02:00
atmel_serial.c Merge 4.11-rc5 into tty-next 2017-04-03 14:18:16 +02:00
atmel_serial.h tty/serial: atmel: move atmel_serial header into driver directory 2017-03-14 10:59:04 +08:00
bcm63xx_uart.c serial/bcm63xx_uart: constify uart_ops structures 2016-09-02 15:01:16 +02:00
bfin_sport_uart.c tty: serial: constify dev_pm_ops structures 2017-01-19 14:20:23 +01:00
bfin_sport_uart.h
bfin_uart.c serial:bfin-uart:Remove 'struct timeval' 2015-12-13 19:59:48 -08:00
clps711x.c serial: clps711x: Changing the compatibility string to match with the smallest supported chip 2016-07-06 17:38:16 +02:00
crisv10.c sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
crisv10.h
digicolor-usart.c tty/serial: digicolor: Fix bad usage of IS_ERR_VALUE 2016-02-14 17:39:36 -08:00
dz.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
dz.h
earlycon-arm-semihost.c tty/serial: mark __init early_smh_setup() static 2016-09-02 15:03:35 +02:00
earlycon.c ACPI: parse SPCR and enable matching console 2016-09-28 17:46:46 +02:00
efm32-uart.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
etraxfs-uart.c serial: etraxfs-uart: Fix crash 2015-11-20 16:19:54 -08:00
fsl_lpuart.c tty: serial: fsl_lpuart: lock port on console write 2017-03-31 16:56:10 +02:00
icom.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
icom.h
ifx6x60.c serial: ifx6x60: Free memory when probe fails 2016-11-10 14:50:46 +01:00
ifx6x60.h
imx.c imx-serial: Reduce RX DMA startup latency when opening for reading 2017-04-11 21:36:43 +02:00
ioc3_serial.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
ioc4_serial.c scripts/spelling.txt: add "comsume(r)" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
ip22zilog.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
ip22zilog.h
Kconfig serial: altera_uart: add earlycon support 2017-03-31 16:56:10 +02:00
kgdb_nmi.c
kgdboc.c
lantiq.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
lpc32xx_hs.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
m32r_sio_reg.h
m32r_sio.c serial: m32r_sio: make it explicitly non-modular 2016-06-25 14:00:06 -07:00
Makefile serial: small Makefile reordering 2017-04-18 18:01:52 +02:00
max310x.c serial: max310x: Add support for newer silicon revisions 2017-01-12 11:51:24 +01:00
max3100.c tty: serial: constify uart_ops structures 2016-09-02 15:01:16 +02:00
mcf.c
men_z135_uart.c tty: serial: constify uart_ops structures 2016-09-02 15:01:16 +02:00
meson_uart.c tty: serial: meson: allow baud-rates higher than 115200 2017-01-19 14:38:57 +01:00
mpc52xx_uart.c tty: serial: constify psc_ops structs 2016-02-06 22:31:47 -08:00
mps2-uart.c serial: mps2-uart: make driver explicitly non-modular 2016-06-25 14:01:57 -07:00
mpsc.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
msm_serial.c tty: serial: msm: Fix module autoload 2017-01-12 11:51:25 +01:00
mux.c
mvebu-uart.c serial: mvebu-uart: free the IRQ in ->shutdown() 2016-06-25 14:00:06 -07:00
mxs-auart.c serial: mxs-auart: Fix baudrate calculation 2017-03-31 17:26:19 +02:00
netx-serial.c
omap-serial.c tty: serial: omap: add UPF_BOOT_AUTOCONF flag for DT init 2017-04-12 22:12:16 +02:00
pch_uart.c serial: pch_uart: add terminate entry for dmi_system_id tables 2016-10-27 16:01:31 +02:00
pic32_uart.c serial: pic32_uart: Fix 'request_irq' and 'free_irq' inconsistancy 2017-01-12 11:51:24 +01:00
pic32_uart.h serial: pic32_uart: Add PIC32 UART driver 2016-05-13 14:01:56 +02:00
pmac_zilog.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
pmac_zilog.h
pnx8xxx_uart.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
pxa.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
rp2.c
sa1100.c
samsung.c serial: samsung: Remove useless spinlock 2017-04-08 18:58:52 +02:00
samsung.h serial: samsung: Simplify DMA engine initialization code 2017-01-12 11:51:24 +01:00
sb1250-duart.c drivers: convert sbd_duart.map_guard from atomic_t to refcount_t 2017-03-14 11:01:40 +08:00
sc16is7xx.c sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h> 2017-03-02 08:42:27 +01:00
sccnxp.c
serial_core.c serial: core: Re-use struct uart_port {name} field 2017-04-08 18:51:57 +02:00
serial_ks8695.c serial: Fix ASYNC_* => UPF_* flags misuse 2016-01-28 14:17:42 -08:00
serial_mctrl_gpio.c serial: mctrl_gpio: enable API usage only for initialized mctrl_gpios struct 2016-06-25 14:30:42 -07:00
serial_mctrl_gpio.h serial: mctrl_gpio: add modem control read routine 2016-06-25 14:30:42 -07:00
serial_txx9.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
serial-tegra.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
sh-sci.c serial: sh-sci: Fix (AUTO)RTS in sci_init_pins() 2017-03-31 15:29:06 +02:00
sh-sci.h serial: sh-sci: consider DR (data ready) bit adequately 2017-02-03 10:14:10 +01:00
sirfsoc_uart.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
sirfsoc_uart.h serial: sirf: make fifo functions static 2016-06-25 14:01:57 -07:00
sn_console.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
sprd_serial.c serial: sprd: adjust TIMEOUT to a big value 2017-04-08 18:42:47 +02:00
st-asc.c TTY/Serial patches for 4.12-rc1 2017-05-08 18:49:23 -07:00
stm32-usart.c serial: stm32: mark symbols static where possible 2016-09-27 12:55:27 +02:00
stm32-usart.h serial: stm32: Fix comparisons with undefined register 2016-10-27 16:00:31 +02:00
suncore.c
sunhv.c sparc64: Send break twice from console to return to boot prom 2017-02-23 08:27:24 -08:00
sunsab.c
sunsab.h
sunsu.c serial: sunsu: Free memory when probe fails 2016-11-16 10:57:26 +01:00
sunzilog.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
sunzilog.h
tilegx.c
timbuart.c tty: serial: constify uart_ops structures 2016-09-02 15:01:16 +02:00
timbuart.h
uartlite.c uartlite: Adding a kernel parameter for the number of uartlites 2017-03-17 14:14:30 +09:00
ucc_uart.c QE-UART: add "fsl,t1040-ucc-uart" to of_device_id 2016-05-01 13:55:12 -07:00
vr41xx_siu.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
vt8500_serial.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
xilinx_uartps.c serial: xuartps: Enable clocks in the pm disable case also 2017-04-08 18:54:07 +02:00
zs.c tty: serial: constify uart_ops structures 2017-01-27 09:23:36 +01:00
zs.h