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Mark Brown f534666815 Input: wm831x-ts - fix races with IRQ management 
If the WM831x pen down and data IRQs run in parallel it is possible for the
data and pen down IRQs to deadlock themselves as one is part way through
disabling its operation while the other is part way through enabling. Fix
this by always disabling the pen down interrupt while data is active and
vice versa.  When a changeover is required we disable the IRQ that is to
be stopped then schedule work that will enable the new IRQ.

We need to handle the data flow in the data IRQ as the readback from the
device needs to be ordered correctly with the IRQ for robust operation.

This also fixes an issue when using the built in IRQs due to enable_irq()
not being valid from interrupt context on an interrupt controller with bus
operations like the built in IRQ controller - this issue may also have
affected other interrupt controllers.  We can't rely on having the data
and pen down IRQs available via GPIOs on the CPU on every system.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2011-04-27 23:12:12 -07:00
..
accessibility
acpi ACPI / PM: Call suspend_nvs_free() earlier during resume 2011-01-20 18:30:17 -08:00
amba
ata libata: set queue DMA alignment to sector size for ATAPI too 2011-01-28 03:16:20 -05:00
atm Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2011-01-24 13:17:06 -08:00
auxdisplay
base PM / Runtime: Don't enable interrupts while running in_interrupt 2011-01-25 20:50:07 +01:00
block
bluetooth Bluetooth: ath3k: reduce memory usage 2011-01-19 14:40:41 -02:00
cdrom
char Input: sysrq - rework re-inject logic 2011-02-02 23:02:23 -08:00
clk
clocksource drivers/clocksource/tcb_clksrc.c: fix init sequence 2011-01-26 10:50:04 +10:00
connector
cpufreq kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
cpuidle
crypto
dca
dio
dma Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-01-17 10:54:41 -08:00
edac
eisa
firewire Merge branches 'fixes' and 'fwnet' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2011-01-21 13:34:39 -08:00
firmware kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
gpio langwell_gpio: modify EOI handling following change of kernel irq subsystem 2011-01-26 10:49:59 +10:00
gpu Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2011-01-28 12:10:13 +10:00
hid Input: bcm5974 - add support for MacBookPro8 2011-03-12 20:37:30 -08:00
hwmon hwmon: (lis3) turn down the no IRQ message 2011-01-25 09:10:50 -08:00
i2c i2c: Encourage move to dev_pm_ops by warning on use of legacy methods 2011-01-14 22:03:50 +01:00
ide kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
idle fix a shutdown regression in intel_idle 2011-01-25 05:57:34 +10:00
ieee802154
infiniband kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
input Input: wm831x-ts - fix races with IRQ management 2011-04-27 23:12:12 -07:00
isdn
leds leds: leds-pwm: return proper error if pwm_request failed 2011-01-26 10:49:58 +10:00
lguest lguest: compile fixes 2011-01-20 21:37:29 +10:30
macintosh powerpc/macintosh: Fix wrong test in fan_{read,write}_reg() 2011-01-21 14:08:34 +11:00
mca
md
media Input: switch completely over to the new versions of get/setkeycode 2011-01-31 21:16:59 -08:00
memstick
message
mfd
misc
mmc ARM: mmci: round down the bytes transferred on error 2011-01-31 10:53:37 +00:00
mtd Revert "UBI: use mtd->writebufsize to set minimal I/O unit size" 2011-01-29 18:27:13 +02:00
net bnx2: Eliminate AER error messages on systems not supporting it 2011-01-26 14:28:52 -08:00
nfc drivers/nfc/pn544.c: fix min_t warnings 2011-01-16 17:28:21 -08:00
nubus
of dt/flattree: Return virtual address from early_init_dt_alloc_memory_arch() 2011-01-15 22:01:58 -07:00
oprofile
parisc
parport parport: make lockdep happy with waitlist_lock 2011-01-26 10:49:59 +10:00
pci kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
pcmcia kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
platform intel_scu_ipc: remove duplicated #include 2011-01-31 12:59:34 +10:00
pnp
power
pps pps: claim parallel port exclusively 2011-01-26 10:50:00 +10:00
ps3
rapidio rapidio: fix new kernel-doc warnings 2011-01-22 20:32:37 -08:00
regulator
rtc RTC: Remove Kconfig symbol for UIE emulation 2011-01-21 17:38:20 +01:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2011-01-19 20:25:45 -08:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-post-merge-2.6 2011-01-14 16:29:49 -08:00
sfi
sh sh: update INTC to clear IRQ sense valid flag 2011-01-19 19:02:35 +09:00
sn
spi Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus 2011-01-18 14:28:48 -08:00
ssb kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
staging Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 2011-02-01 08:06:31 +10:00
target
tc
telephony
thermal
tty Merge branch 'next' into for-linus 2011-03-18 23:38:50 -07:00
uio
usb Merge branch 'for-usb-linus' of master.kernel.org:/pub/scm/linux/kernel/git/sarah/xhci into usb-linus 2011-01-24 08:14:07 +09:00
uwb
vhost
video console: rename acquire/release_console_sem() to console_lock/unlock() 2011-01-26 10:50:06 +10:00
virtio virtio: remove virtio-pci root device 2011-01-20 21:37:30 +10:30
vlynq
w1
watchdog
xen Merge branch 'xen/xenbus' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen 2011-01-20 16:37:28 -08:00
zorro
Kconfig
Makefile Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2011-01-20 16:39:23 -08:00