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Darron Broad 59b1842da1 V4L/DVB (9227): MFE: Add multi-frontend mutual exclusion 
This add frontend R/W mutual exclusion.
Prior to this point in time it was possible to open both
frontends simultaneously which an MFE card cannot support.

In order to stop this, a delayed open is performed which
has the following function:

-  Return EBUSY after a configurable amount of time
   if a frontend is unavailable due to the other being
   in use.

-  Only allow opening of a frontend if the kernel thread
   of the other has stopped.

This solution was chosen to allow switching between
frontends to work as seamlessly as possible. When both
frontends are actually opened simultaneously then one
will only open, but if quick switching is performed
between one of many then the new open will succeed in
a clean fashion rather than interrupting a kernel
thread.

Signed-off-by: Darron Broad <darron@kewl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2008-10-17 17:24:15 -03:00
..
accessibility braille_console: only register notifiers when the braille console is used 2008-10-02 15:53:13 -07:00
acpi rtc-cmos: move wake setup from ACPI glue into RTC driver 2008-10-14 16:08:21 -07:00
amba
ata Merge commit 'origin' 2008-10-15 11:31:54 +11:00
atm Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-10-11 12:39:35 -07:00
auxdisplay
base Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2008-10-16 12:40:26 -07:00
block device create: block: convert device_create_drvdata to device_create 2008-10-16 09:24:41 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2008-10-13 14:12:40 -07:00
cdrom gdrom: change to use __blk_end_request() 2008-10-09 08:56:21 +02:00
char Merge branch 'agp-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6 2008-10-16 12:43:49 -07:00
clocksource clocksource, acpi_pm.c: fix check for monotonicity 2008-09-11 11:14:29 +02:00
connector
cpufreq [CPUFREQ] Fix BUG: using smp_processor_id() in preemptible code 2008-10-09 13:52:44 -04:00
cpuidle
crypto crypto: talitos - Avoid consecutive packets going out with same IV 2008-09-14 13:41:19 -07:00
dca device create: misc: convert device_create_drvdata to device_create 2008-10-16 09:24:43 -07:00
dio
dma dw_dmac: fix copy/paste bug in tasklet 2008-10-03 18:22:18 -07:00
edac edac i5000: fix thermal issues 2008-10-16 11:21:48 -07:00
eisa
firewire firewire: fix ioctl() return code 2008-10-15 22:21:10 +02:00
firmware Merge branch 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-16 15:17:40 -07:00
gpio gpiolib: request/free hooks 2008-10-16 11:21:40 -07:00
gpu misc: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
hid Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2008-10-16 12:40:26 -07:00
hwmon hwmon: (adm1026) Prevent log spamming 2008-10-17 17:51:20 +02:00
i2c hwmon: (ams) Convert to a new-style i2c driver 2008-10-17 17:51:12 +02:00
ide block: remove __generic_unplug_device() from exports 2008-10-17 14:03:08 +02:00
ieee1394 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2008-10-16 15:02:24 -07:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-17 09:00:23 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2008-10-16 11:52:08 -07:00
isdn device create: misc: convert device_create_drvdata to device_create 2008-10-16 09:24:43 -07:00
leds device create: misc: convert device_create_drvdata to device_create 2008-10-16 09:24:43 -07:00
lguest
macintosh device create: misc: convert device_create_drvdata to device_create 2008-10-16 09:24:43 -07:00
mca
md Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-17 09:00:23 -07:00
media V4L/DVB (9227): MFE: Add multi-frontend mutual exclusion 2008-10-17 17:24:15 -03:00
memstick memstick: change to use __blk_end_request() 2008-10-09 08:56:20 +02:00
message i2o: Fix 32/64bit DMA locking 2008-10-16 11:21:38 -07:00
mfd Merge branch 's3c-move' into devel 2008-10-14 22:24:51 +01:00
misc Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2008-10-16 12:40:26 -07:00
mmc Merge branch 'fixes' into for-linus 2008-10-15 23:16:07 +01:00
mtd Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2008-10-16 12:40:26 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-10-17 08:58:52 -07:00
nubus nubus: fix mis-indented statement 2008-10-16 11:21:30 -07:00
of Merge commit 'gcl/gcl-next' 2008-10-14 10:11:27 +11:00
oprofile Merge branch 'linus' into oprofile-v2 2008-10-13 11:05:51 +02:00
parisc
parport parport: remove CVS keywords 2008-10-16 11:21:49 -07:00
pci {pci,pnp} quirks.c: don't use deprecated print_fn_descriptor_symbol() 2008-10-16 16:11:43 -07:00
pcmcia [ARM] 5307/1: pxa: fix CM-X2XX PCMCIA build error 2008-10-15 12:34:50 +01:00
pnp {pci,pnp} quirks.c: don't use deprecated print_fn_descriptor_symbol() 2008-10-16 16:11:43 -07:00
power Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2008-10-16 12:40:26 -07:00
ps3
rapidio
regulator da903x: add regulator support for DA9030/DA9034 2008-10-13 21:51:57 +01:00
rtc rtc: rtc-ds1286 and rtc-m48t35 need <linux/io.h> 2008-10-16 11:32:38 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 2008-10-17 09:29:55 -07:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-17 09:00:23 -07:00
serial Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2008-10-16 11:25:32 -07:00
sh
sn
spi Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2008-10-16 12:40:26 -07:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2008-10-13 14:12:40 -07:00
staging staging: at76_usb wireless driver 2008-10-13 14:33:13 -07:00
tc
telephony telephony: remove CVS keywords 2008-10-16 11:21:45 -07:00
thermal
uio UIO: Fix mapping of logical and virtual memory 2008-10-16 09:24:54 -07:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2008-10-16 12:40:26 -07:00
video Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2008-10-16 12:40:26 -07:00
virtio
w1 w1: new driver. DS2431 chip 2008-10-16 11:21:51 -07:00
watchdog Merge branch 's3c-move' into devel 2008-10-14 22:24:51 +01:00
xen xen: remove unused balloon.h 2008-10-03 10:04:10 +02:00
zorro
Kconfig Staging: add Kconfig entries and Makefile infrastructure 2008-10-10 15:31:06 -07:00
Makefile Staging: add Kconfig entries and Makefile infrastructure 2008-10-10 15:31:06 -07:00