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linux-uconsole/drivers/tty/serial
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James Hogan d791a3e3eb serial: 8250_dw: Fix LCR workaround regression 
commit 6979f8d280 upstream.

Commit c49436b657 (serial: 8250_dw: Improve unwritable LCR workaround)
caused a regression. It added a check that the LCR was written properly
to detect and workaround the busy quirk, but the behaviour of bit 5
(UART_LCR_SPAR) differs between IP versions 3.00a and 3.14c per the
docs. On older versions this caused the check to fail and it would
repeatedly force idle and rewrite the LCR register, causing delays and
preventing any input from serial being received.

This is fixed by masking out UART_LCR_SPAR before making the comparison.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Tim Kryger <tim.kryger@linaro.org>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Cc: Matt Porter <matt.porter@linaro.org>
Cc: Markus Mayer <markus.mayer@linaro.org>
Tested-by: Tim Kryger <tim.kryger@linaro.org>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-09 11:14:02 -07:00
..
8250 serial: 8250_dw: Fix LCR workaround regression 2014-07-09 11:14:02 -07:00
cpm_uart TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
jsm TTY: jsm, remove superfluous check 2013-03-18 16:17:20 -07:00
21285.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
68328serial.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2013-05-10 07:22:35 -07:00
altera_jtaguart.c tty: serial: altera_jtaguart: Simplify altera_jtaguart_init() 2013-02-05 11:13:51 -08:00
altera_uart.c tty: serial: altera_uart: Simplify altera_uart_init() 2013-02-05 11:13:50 -08:00
amba-pl010.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
amba-pl011.c serial: amba-pl011: use port lock to guard control register access 2014-01-25 08:27:12 -08:00
apbuart.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
apbuart.h
ar933x_uart.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
arc_uart.c serial: arc_uart: Fix module alias 2013-08-11 18:35:21 -07:00
atmel_serial.c tty/serial: at91: Handle shutdown more safely 2014-02-06 11:08:14 -08:00
bcm63xx_uart.c MIPS: BCM63XX: merge bcm63xx_clk.h into bcm63xx/clk.c 2013-05-08 01:19:04 +02:00
bfin_sport_uart.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
bfin_sport_uart.h tty: bfin-sport-uart: Rx interrupt is not called always with irq disabled. 2011-12-09 19:05:33 -08:00
bfin_uart.c TTY: serial/bfin_uart, unbreak build with KGDB enabled 2013-03-18 16:24:30 -07:00
clps711x.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
crisv10.c crisv10: use counts from tty_port 2013-03-18 16:26:33 -07:00
crisv10.h crisv10: use counts from tty_port 2013-03-18 16:26:33 -07:00
dz.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
dz.h
efm32-uart.c serial/efm32: parse location property 2013-01-21 13:56:46 -08:00
icom.c driver: tty: serial: remove cast for kzalloc return value 2013-03-18 17:09:37 -07:00
icom.h
ifx6x60.c tty: ifx6x60: Remove unused suspend/resume callbacks 2013-03-18 16:29:29 -07:00
ifx6x60.h serial:ifx6x60:Prevent data transfer when IFX6x60 port is shutdown 2012-11-01 08:50:01 -07:00
imx.c serial/imx: disable hardware flow control at startup 2013-06-03 10:08:28 -07:00
ioc3_serial.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
ioc4_serial.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
ip22zilog.c TTY: ip22zilog, fix tty_flip_buffer_push call 2013-01-16 07:36:47 -08:00
ip22zilog.h
Kconfig tty: serial: fix typo "SERIAL_S3C2412" 2013-03-12 08:53:23 -07:00
kgdb_nmi.c kgdb: remove #include <linux/serial_8250.h> from kgdb.h 2013-02-04 15:35:26 -08:00
kgdboc.c KGDB/KDB fixes and cleanups 2012-10-13 11:16:58 +09:00
lantiq.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
lpc32xx_hs.c serial: lpc32xx: Fix fallout from tty_port conversion 2013-01-18 16:05:15 -08:00
m32r_sio.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
m32r_sio.h TTY: serial, include pci.h in m32r_sio 2012-03-08 11:47:02 -08:00
m32r_sio_reg.h m32r: relocate drivers back out of 8250 dir 2012-02-08 15:04:32 -08:00
Makefile serial: rp2: New driver for Comtrol RocketPort 2 cards 2013-01-17 17:28:39 -08:00
max310x.c tty: max310x: Use dev_pm_ops 2013-03-18 16:29:29 -07:00
max3100.c serial: max3100: use spi_get_drvdata() and spi_set_drvdata() 2013-04-05 15:49:39 -07:00
mcf.c serial: mcf: missing uart_unregister_driver() on error in mcf_init() 2013-05-20 11:54:56 -07:00
mfd.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
mpc52xx_uart.c tty: serial: mpc5xxx: fix error handing in mpc52xx_uart_init() 2013-05-20 11:54:55 -07:00
mpsc.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
mrst_max3110.c tty: mrst_max3110: Use dev_pm_ops 2013-03-18 16:29:29 -07:00
mrst_max3110.h max3110: add sysrq support 2011-08-26 11:01:15 -07:00
msm_serial.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
msm_serial.h
msm_serial_hs.c TTY: serial/msm_serial_hs, remove unused tty 2013-03-18 16:24:30 -07:00
msm_smd_tty.c TTY: msm_smd_tty, clean up activate/shutdown 2013-03-18 16:19:44 -07:00
mux.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
mxs-auart.c serial/mxs-auart: increase time to wait for transmitter to become idle 2013-08-11 18:35:21 -07:00
netx-serial.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
nwpserial.c tty: nwpserial: Pass correct pointer to free_irq() 2013-05-20 11:54:55 -07:00
of_serial.c serial: of_serial: Handle auto-flow-control property 2013-03-25 16:36:48 -07:00
omap-serial.c SERIAL: OMAP: Remove the slave idle handling from the driver 2013-05-19 16:37:08 -06:00
pch_uart.c serial: pch_uart: fix tty-kref leak in dma-rx path 2013-10-05 07:13:10 -07:00
pmac_zilog.c TTY: pmac_zilog, check existence of ports in pmz_console_init() 2014-01-09 12:24:19 -08:00
pmac_zilog.h tty/serial/pmac_zilog: Fix suspend & resume 2011-12-16 11:10:01 +11:00
pnx8xxx_uart.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
pxa.c serial: pxa: fine-tune clk useage 2013-01-25 08:52:23 -08:00
rp2.c serial: rp2: New driver for Comtrol RocketPort 2 cards 2013-01-17 17:28:39 -08:00
sa1100.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
samsung.c serial: samsung: enable clock before clearing pending interrupts during init 2013-06-03 10:08:28 -07:00
samsung.h tty: serial/samsung: fix modular build 2013-04-11 13:14:37 -07:00
sb1250-duart.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
sc26xx.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
sccnxp.c serial: sccnxp: Replace pdata.init/exit with regulator API 2013-04-15 11:04:07 -07:00
serial-tegra.c serial: tegra: fix tty-kref leak 2013-10-05 07:13:10 -07:00
serial_core.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
serial_ks8695.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
serial_txx9.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
sh-sci.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
sh-sci.h serial: sh-sci: remove obsolete Kconfig macros 2013-03-25 14:06:45 -07:00
sirfsoc_uart.c tty/serial/sirf: fix MODULE_DEVICE_TABLE 2013-04-23 10:43:18 -07:00
sirfsoc_uart.h serial: sirf: only use lookup table to set baudrate when ioclk=150MHz 2013-01-17 17:18:55 -08:00
sn_console.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
suncore.c tty: sparc: rename drivers/tty/serial/suncore.h -> include/linux/sunserialcore.h 2012-02-10 10:44:35 -08:00
sunhv.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
sunsab.c TTY: serial, stop accessing potential NULLs 2013-03-18 17:09:37 -07:00
sunsab.h
sunsu.c serial: sunsu: add missing platform_driver_unregister() when module exit 2013-05-04 17:39:48 -07:00
sunzilog.c TTY: serial, stop accessing potential NULLs 2013-03-18 17:09:37 -07:00
sunzilog.h
timbuart.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
timbuart.h
uartlite.c tty: serial: uartlite: Support uartlite on big and little endian systems 2013-02-13 08:38:45 -08:00
ucc_uart.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
vr41xx_siu.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
vt8500_serial.c serial: vt8500: add missing braces 2013-11-04 04:31:06 -08:00
xilinx_uartps.c Merge 3.9-rc5 into tty-next 2013-04-01 12:01:10 -07:00
zs.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
zs.h