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9b96fbacda
linux/drivers/tty/serial
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Linus Walleij 9b96fbacda serial: PL011: clear pending interrupts 
Chanho Min reported that when the boot loader transfers
control to the kernel, there may be pending interrupts
causing the UART to lock up in an eternal loop trying to
pick tokens from the FIFO (since the RX interrupt flag
indicates there are tokens) while in practice there are
no tokens - in fact there is only a pending IRQ flag.

This patch address the issue with a combination of two
patches suggested by Russell King that clears and mask
all interrupts at probe() and clears any pending error
and RX interrupts at port startup time.

We suspect the spurious interrupts are a side-effect of
switching the UART from FIFO to non-FIFO mode.

Cc: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Reported-by: Chanho Min <chanho0207@gmail.com>
Suggested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Jong-Sung Kim <neidhard.kim@lge.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-03-14 12:27:39 -07:00
..
8250 serial: remove back and forth conversions in serial_out_sync 2012-03-09 12:47:56 -08:00
cpm_uart TTY: serial, fix includes in some drivers 2011-09-22 15:49:26 -07:00
jsm jsm: Fixed EEH recovery error 2012-01-24 12:55:36 -08:00
21285.c serial: Kill off NO_IRQ 2012-01-26 17:14:50 -08:00
68328serial.c TTY: remove unneeded tty->index checks 2012-03-08 11:42:21 -08:00
68328serial.h TTY: serial, remove dead code from 68328 2011-09-22 15:47:54 -07:00
altera_jtaguart.c Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6 2011-10-27 08:35:41 +02:00
altera_uart.c tty: serial: altera_uart: Add CONSOLE_POLL support 2012-02-09 09:04:24 -08:00
amba-pl010.c serial: pl010: Enable module alias autogeneration for AMBA drivers 2011-11-22 10:58:32 +00:00
amba-pl011.c serial: PL011: clear pending interrupts 2012-03-14 12:27:39 -07:00
apbuart.c apbuart: fix section mismatch warning 2011-12-27 16:33:13 -05:00
apbuart.h
ar933x_uart.c SERIAL: AR933X: Add driver for the built-in UART of the SoC 2011-12-07 22:02:46 +00:00
atmel_serial.c atmel_serial: fix spinlock lockup in RS485 code 2012-01-04 16:19:34 -08:00
bcm63xx_uart.c serial: bcm63xx_uart: fix irq storm after rx fifo overrun. 2011-06-16 12:01:58 -07:00
bfin_sport_uart.c serial: bfin-sport-uart: Add tty ASYNC_CTS_FLOW flag to do CTS flow control. 2011-12-09 19:05:33 -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 serial: bfin-uart: Don't access tty circular buffer in TX DMA interrupt after it is reset. 2012-03-13 14:33:39 -07:00
clps711x.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
crisv10.c TTY: remove unneeded tty->index checks 2012-03-08 11:42:21 -08:00
crisv10.h
dz.c TTY: serial, fix includes in some drivers 2011-09-22 15:49:26 -07:00
dz.h
efm32-uart.c serial/efm32: add new driver 2012-01-26 11:29:47 -08:00
icom.c TTY: irq: Remove IRQF_DISABLED 2011-09-22 16:08:57 -07:00
icom.h
ifx6x60.c TTY: remove re-assignments to tty_driver members 2012-03-08 11:37:58 -08:00
ifx6x60.h serial: ifx6x60: minor cleanup 2011-02-17 11:16:15 -08:00
imx.c tty: serial: imx: move del_timer_sync() to avoid potential deadlock 2012-01-04 16:30:36 -08:00
ioc3_serial.c TTY: serial, fix includes in some drivers 2011-09-22 15:49:26 -07:00
ioc4_serial.c TTY: remove serialP.h inclusion from some files 2012-03-08 11:47:02 -08:00
ip22zilog.c Fix common misspellings 2011-03-31 11:26:23 -03:00
ip22zilog.h
Kconfig Merge tag 'tty-3.3-rc3' tty-next 2012-02-10 10:25:27 -08:00
kgdboc.c tty: Add module.h to drivers/tty users who just expect it there. 2011-10-31 19:31:27 -04:00
lantiq.c Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty 2011-10-26 15:11:09 +02:00
m32r_sio_reg.h m32r: relocate drivers back out of 8250 dir 2012-02-08 15:04:32 -08:00
m32r_sio.c TTY: remove serialP.h inclusion from some files 2012-03-08 11:47:02 -08:00
m32r_sio.h TTY: serial, include pci.h in m32r_sio 2012-03-08 11:47:02 -08:00
Makefile Merge tag 'tty-3.3-rc3' tty-next 2012-02-10 10:25:27 -08:00
max3100.c TTY: Remove redundant spi driver bus initialization 2011-11-26 20:19:21 -08:00
max3107.c TTY: Remove redundant spi driver bus initialization 2011-11-26 20:19:21 -08:00
max3107.h Fix common misspellings 2011-03-31 11:26:23 -03:00
mcf.c TTY: irq: Remove IRQF_DISABLED 2011-09-22 16:08:57 -07:00
mfd.c Merge 3.2-rc3 into tty-next to handle merge conflict in tty_ldisc.c 2011-11-26 20:07:25 -08:00
mpc52xx_uart.c mpc5200b/uart: select more tolerant uart prescaler on low baudrates 2012-03-08 13:15:50 -08:00
mpsc.c
mrst_max3110.c TTY: Remove redundant spi driver bus initialization 2011-11-26 20:19:21 -08:00
mrst_max3110.h max3110: add sysrq support 2011-08-26 11:01:15 -07:00
msm_serial_hs.c msm_serial_hs: Fix spinlock recursion in handling CTS 2011-12-09 19:10:04 -08:00
msm_serial.c Merge branch 'next/dt' of git://git.linaro.org/people/arnd/arm-soc 2011-11-01 21:02:35 -07:00
msm_serial.h tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
msm_smd_tty.c TTY: remove re-assignments to tty_driver members 2012-03-08 11:37:58 -08:00
mux.c tty/serial/mux.c: linux/tty.h included twice 2012-02-24 13:50:45 -08:00
mxs-auart.c clock management changes for i.MX 2012-01-09 14:44:15 -08:00
netx-serial.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
nwpserial.c tty: Add export.h for EXPORT_SYMBOL/THIS_MODULE to exporters 2011-10-31 19:31:28 -04:00
of_serial.c drivercore: Add helper macro for platform_driver boilerplate 2011-10-25 00:35:47 +02:00
omap-serial.c tty: serial: OMAP: Fix oops due to NULL pdata in DT boot 2012-03-08 10:56:44 -08:00
pch_uart.c pch_uart: Add module parameter descriptions 2012-03-09 12:43:20 -08:00
pmac_zilog.c serial: Kill off NO_IRQ 2012-01-26 17:14:50 -08:00
pmac_zilog.h tty/serial/pmac_zilog: Fix suspend & resume 2011-12-16 11:10:01 +11:00
pnx8xxx_uart.c
pxa.c serial: pxa: work around for errata #20 2011-09-22 15:47:53 -07:00
sa1100.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
samsung.c serial: samsung: fix s3c2442 platform data 2012-02-24 13:50:46 -08:00
samsung.h serial: samsung: merge probe() function from all SoC specific extensions 2011-12-23 10:07:00 +09:00
sb1250-duart.c TTY: serial, fix includes in some drivers 2011-09-22 15:49:26 -07:00
sc26xx.c TTY: serial: convert drivers/tty/serial/* to use module_platform_driver() 2011-11-30 20:11:46 +09:00
serial_core.c TTY: remove re-assignments to tty_driver members 2012-03-08 11:37:58 -08:00
serial_ks8695.c TTY: irq: Remove IRQF_DISABLED 2011-09-22 16:08:57 -07:00
serial_txx9.c TTY: serial, fix includes in some drivers 2011-09-22 15:49:26 -07:00
sh-sci.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2012-01-17 18:40:24 -08:00
sh-sci.h ARM: mach-shmobile: R-Mobile A1 support. 2011-11-11 16:55:31 +09:00
sirfsoc_uart.c UART: add CSR SiRFprimaII SoC on-chip uart drivers 2011-11-17 11:46:04 -08:00
sirfsoc_uart.h UART: add CSR SiRFprimaII SoC on-chip uart drivers 2011-11-17 11:46:04 -08:00
sn_console.c serial: Fix typo in sn_console.c 2012-02-24 13:50:45 -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: sparc: rename drivers/tty/serial/suncore.h -> include/linux/sunserialcore.h 2012-02-10 10:44:35 -08:00
sunsab.c tty: sparc: rename drivers/tty/serial/suncore.h -> include/linux/sunserialcore.h 2012-02-10 10:44:35 -08:00
sunsab.h
sunsu.c tty: sparc: rename drivers/tty/serial/suncore.h -> include/linux/sunserialcore.h 2012-02-10 10:44:35 -08:00
sunzilog.c tty: sparc: rename drivers/tty/serial/suncore.h -> include/linux/sunserialcore.h 2012-02-10 10:44:35 -08:00
sunzilog.h
timbuart.c TTY: serial: convert drivers/tty/serial/* to use module_platform_driver() 2011-11-30 20:11:46 +09:00
timbuart.h
uartlite.c Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6 2011-10-27 08:35:41 +02:00
ucc_uart.c serial: Kill off NO_IRQ 2012-01-26 17:14:50 -08:00
vr41xx_siu.c serial: Kill off NO_IRQ 2012-01-26 17:14:50 -08:00
vt8500_serial.c tty: serial: vt8500: fix annotations for probe/remove 2012-03-12 10:21:55 -07:00
xilinx_uartps.c tty: Add module.h to drivers/tty users who just expect it there. 2011-10-31 19:31:27 -04:00
zs.c TTY: serial, fix includes in some drivers 2011-09-22 15:49:26 -07:00
zs.h