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2009-03-30PM: Introduce functions for suspending and resuming device interruptsRafael J. Wysocki
Introduce helper functions allowing us to prevent device drivers from getting any interrupts (without disabling interrupts on the CPU) during suspend (or hibernation) and to make them start to receive interrupts again during the subsequent resume. These functions make it possible to keep timer interrupts enabled while the "late" suspend and "early" resume callbacks provided by device drivers are being executed. In turn, this allows device drivers' "late" suspend and "early" resume callbacks to sleep, execute ACPI callbacks etc. The functions introduced here will be used to rework the handling of interrupts during suspend (hibernation) and resume. Namely, interrupts will only be disabled on the CPU right before suspending sysdevs, while device drivers will be prevented from receiving interrupts, with the help of the new helper function, before their "late" suspend callbacks run (and analogously during resume). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Ingo Molnar <mingo@elte.hu>
2009-03-30Merge branch 'x86-stage-3-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-stage-3-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (190 commits) Revert "cpuacct: reduce one NULL check in fast-path" Revert "x86: don't compile vsmp_64 for 32bit" x86: Correct behaviour of irq affinity x86: early_ioremap_init(), use __fix_to_virt(), because we are sure it's safe x86: use default_cpu_mask_to_apicid for 64bit x86: fix set_extra_move_desc calling x86, PAT, PCI: Change vma prot in pci_mmap to reflect inherited prot x86/dmi: fix dmi_alloc() section mismatches x86: e820 fix various signedness issues in setup.c and e820.c x86: apic/io_apic.c define msi_ir_chip and ir_ioapic_chip all the time x86: irq.c keep CONFIG_X86_LOCAL_APIC interrupts together x86: irq.c use same path for show_interrupts x86: cpu/cpu.h cleanup x86: Fix a couple of sparse warnings in arch/x86/kernel/apic/io_apic.c Revert "x86: create a non-zero sized bm_pte only when needed" x86: pci-nommu.c cleanup x86: io_delay.c cleanup x86: rtc.c cleanup x86: i8253 cleanup x86: kdebugfs.c cleanup ...
2009-03-30Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6Linus Torvalds
* 'bkl-removal' of git://git.lwn.net/linux-2.6: Fix a lockdep warning in fasync_helper() Add a missing unlock_kernel() in raw_open()
2009-03-30Merge branch 'next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (180 commits) powerpc: clean up ssi.txt, add definition for fsl,ssi-asynchronous powerpc/85xx: Add support for the "socrates" board (MPC8544). powerpc: Fix bugs introduced by sysfs changes powerpc: Sanitize stack pointer in signal handling code powerpc: Add write barrier before enabling DTL flags powerpc/83xx: Update ranges in gianfar node to match other dts powerpc/86xx: Move gianfar mdio nodes under the ethernet nodes powerpc/85xx: Move gianfar mdio nodes under the ethernet nodes powerpc/83xx: Move gianfar mdio nodes under the ethernet nodes powerpc/83xx: Add power management support for MPC837x boards powerpc/mm: Introduce early_init_mmu() on 64-bit powerpc/mm: Add option for non-atomic PTE updates to ppc64 powerpc/mm: Fix printk type warning in mmu_context_nohash powerpc/mm: Rename arch/powerpc/kernel/mmap.c to mmap_64.c powerpc/mm: Merge various PTE bits and accessors definitions powerpc/mm: Tweak PTE bit combination definitions powerpc/cell: Fix iommu exception reporting powerpc/mm: e300c2/c3/c4 TLB errata workaround powerpc/mm: Used free register to save a few cycles in SW TLB miss handling powerpc/mm: Remove unused register usage in SW TLB miss handling ...
2009-03-30Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (707 commits) V4L/DVB (11316): saa7191: tuner ops wasn't set. V4L/DVB (11315): cx25840: fix 'unused variable' warning. V4L/DVB (11314): au8522: remove unused I2C_DRIVERID V4L/DVB (11313): v4l2-subdev: add enum_framesizes and enum_frameintervals. V4L/DVB (11312): tuner: remove V4L1 code from this driver. V4L/DVB (11311): v4l: replace 'ioctl' references in v4l i2c drivers V4L/DVB (11310): cx18: remove intermediate 'ioctl' step V4L/DVB (11309): cx25840: cleanup: remove intermediate 'ioctl' step V4L/DVB (11308): msp3400: use the V4L2 header since no V4L1 code is there V4L/DVB (11305): cx88: prevent probing rtc and ir devices V4L/DVB (11304): v4l2: remove v4l2_subdev_command calls where they are no longer needed. V4L/DVB (11303): tda7432: remove legacy code for old-style i2c API V4L/DVB (11302): tda9875: remove legacy code for old-style i2c API V4L/DVB (11301): wm8775: remove legacy code for old-style i2c API V4L/DVB (11300): cx88: convert to v4l2_subdev. V4L/DVB (11298): cx25840: remove legacy code for old-style i2c API V4L/DVB (11297): cx23885: convert to v4l2_subdev. V4L/DVB (11296): cx23885: bugfix error message if firmware is not found V4L/DVB (11295): cx23885: convert to v4l2_device. V4L/DVB (11293): uvcvideo: Add zero fill for VIDIOC_ENUM_FMT ...
2009-03-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (70 commits) ide: keep track of number of bytes instead of sectors in struct ide_cmd ide: remove ide_execute_pkt_cmd() (v2) ide: add ->dma_timer_expiry method and remove ->dma_exec_cmd one (v2) ide: set hwif->expiry prior to calling [__]ide_set_handler() ide: use do_rw_taskfile() for ATA_CMD_PACKET commands ide: pass command to ide_map_sg() ide: remove ide_end_request() ide: use ide_end_rq() in ide_complete_rq() ide: pass number of bytes to complete to ide_complete_rq() ide: remove BUG() from ide_complete_rq() ide: move rq->errors quirk out from ide_end_request() ide: pass error value to ide_complete_rq() ide: sanitize ide_end_rq() ide: add ide_end_rq() (v2) ide: make ide_special_rq() BUG() on unknown requests ide: sanitize ide_finish_cmd() ide: use ide_complete_cmd() for REQ_UNPARK_HEADS ide: use ide_complete_cmd() for head unload commands ide: task_error() -> task_error_cmd() ide: unify exit paths in task_pio_intr() ...
2009-03-30V4L/DVB (11313): v4l2-subdev: add enum_framesizes and enum_frameintervals.Hans Verkuil
These callbacks are needed for omap. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11242): allow v4l2 drivers to provide a get_unmapped_area handlerDaniel Glöckner
Shared memory mappings on nommu machines require a get_unmapped_area file operation that suggests an address for the mapping. This patch adds a way for v4l2 drivers to provide this callback. Signed-off-by: Daniel Glöckner <dg@emlix.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11213): gspca - sq905c: New subdriver.Theodore Kilgore
The code in the new sq905c.c is based upon the structure of the code in gspca/sq905.c, and upon the code in libgphoto2/camlibs/digigr8, which supports the same set of cameras in stillcam mode. I am a co-author of gspca/sq905.c and I am the sole author of libgphoto2/camlibs/digigr8, which is licensed under the LGPL. I hereby give myself permission to use my own code from libgphoto2 in gspca/sq905c.c. Signed-off-by: Theodore Kilgore <kilgota@auburn.edu> Signed-off-by: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11118): cafe_ccic: replace debugfs with g/s_register ioctls.Hans Verkuil
Using VIDIOC_DBG_S/G_REGISTER is the standard way of reading/writing register for advanced debugging under v4l2. In addition, using this means that the cafe_ccic driver doesn't need to have knowledge about the used sensor: the debug ioctl can be passed on to the sensor if it isn't for the host. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11112): v4l2-subdev: add support for TRY_FMT, ENUM_FMT and G/S_PARM.Hans Verkuil
These ops are used by the ov7670 driver, so these need to be added. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11096): V4L2 Driver for the Hauppauge HD PVR usb capture deviceJanne Grunau
The device encodes component video up to 1080i to a MPEG-TS stream with H.264 video and stereo AAC audio. Newer firmwares accept also AC3 (up to 5.1) audio over optical SPDIF without reencoding. Firmware upgrade is unimplemeted but rather unimportant since the firmware sits on a flash chip. The I2C adapter to drive the integrated infrared receiver/sender is currently disabled due to a conflict with cx18-based devices. Tested-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Janne Grunau <j@jannau.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11076): au0828: make g_chip_ident call work properlyDevin Heitmueller
Make the g_chip_ident call work for the au0828/au8522. Discovered when testing with the v4l2_compliance tool Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org> Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> [mchehab@redhat.com: fix merge conflict, due to a path change for analog demod] Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11065): au8522: add support for analog side of demodulatorDevin Heitmueller
Add support for the analog functionality in the au8522 analog/digital demodulator Thanks to Michael Krufky <mkrufky@linuxtv.org> and Steven Toth <stoth@linuxtv.org> for providing sample hardware, engineering level support, and testing. Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org> Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> [mchehab: renamed drivers/media/video/au8522_decoder.c as drivers/media/dvb/frontends/au8522_decoder.c to avoid breaking bisect] Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11044): v4l2-device: add v4l2_device_disconnectHans Verkuil
Call v4l2_device_disconnect when the parent of a hotpluggable device disconnects. This ensures that you do not have a pointer to a device that is no longer present. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11042): v4l2-api: Add definitions for V4L2_MPEG_STREAM_VBI_FMT_IVTV ↵Andy Walls
payloads This addition to the v4l2-api add definitions for the constants and data structures used for sliced VBI data insertion into MPEG streams triggered by V4L2_MPEG_STREAM_VBI_FMT_IVTV. This simply declares what the ivtv and cx18 drivers and MythTV have already been doing and provides a proper data structure definition to user space. Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11034): soc-camera: remove now unused gpio member of struct ↵Sascha Hauer
soc_camera_link Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11030): soc-camera: add board hook to specify the buswidth for ↵Sascha Hauer
camera sensors Camera sensors have a native bus width say support, but on some boards not all sensor data lines are connected to the image interface and thus support a different bus width than the sensors native one. Some boards even have a bus driver which dynamically switches between different bus widths with a GPIO. This patch adds a hook which board code can use to support different bus widths. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11027): soc-camera: configure drivers with a default format at ↵Guennadi Liakhovetski
probe time Currently soc-camera doesn't set up any image format without an explicit S_FMT. According to the API this should be supported, for example, capture-example.c from v4l2-apps by default doesn't issue an S_FMT. This patch moves negotiating of available host-camera format translations to probe() time, and restores the state from the last close() on the next open(). This is needed for some drivers, which power down or reset hardware after the last user closes the interface. This patch also has a nice side-effect of avoiding multiple allocation anf freeing of format translation tables. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11024): soc-camera: separate S_FMT and S_CROP operationsGuennadi Liakhovetski
As host and camera drivers become more complex, differences between S_FMT and S_CROP functionality grow, this patch separates them. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11022): zoran/bt819: use new notify functionality.Hans Verkuil
Bt819 needs the parent driver to drive a GPIO pin low and high in order to reset its fifo. Use the new notify callback for this. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (11021): v4l2-device: add a notify callback.Hans Verkuil
Add a notify callback to v4l2_device to let sub-devices notify their parent of special events. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10908): videobuf-core: also needs a minimal subset of V4L1 headerMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10939): ir-kbd-i2c: Prevent general protection fault on rmmodJean Delvare
The removal of the timer which polls the infrared input is racy. Replacing the timer with a delayed work solves the problem. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10910): videodev2.h: remove deprecated VIDIOC_G_CHIP_IDENT_OLDHans Verkuil
As announced VIDIOC_G_CHIP_IDENT_OLD is now removed for 2.6.30. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10907): avoid loading the entire videodev.h header on V4L2 driversMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10870a): remove all references for video_decoder.hMauro Carvalho Chehab
changeset 04934e44e3784a1b969582e2d59afcec278470c6 removed the last implementation that were still using the V4L1 obsoleted header. Now, video_decoder.h is not used anymore by any driver. Let's remove it and all references for it in Kernel. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10863): saa7191: convert to v4l2_subdev.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10862): indycam: convert to v4l2_subdevHans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10813): v4l2: New function v4l2_video_std_frame_periodTrent Piepho
Some code was calling v4l2_video_std_construct() when all it cared about was the frame period. So make a function that just returns that and have v4l2_video_std_construct() use it. At this point there are no users of v4l2_video_std_construct() left outside of v4l2-ioctl, so it could be un-exported and made static. Change v4l2_video_std_construct() so that it doesn't zero out the struct v4l2_standard passed in. It's already been zeroed out in the common ioctl code. Signed-off-by: Trent Piepho <xyzzy@speakeasy.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10771): tea575x-tuner: convert it to V4L2 APIMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10757): cx18, v4l2-chip-ident: Finish conversion of AV decoder core ↵Andy Walls
to v4l2_subdev Added a new chip identifer to v4l2-chip-ident for the integrated A/V broadcast decoder core internal to the CX23418. Completed separation and encapsulation of the A/V decoder core interface as a v4l2_subdevice. The cx18 driver now compiles and links again. Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10744): dm1105: infrared remote code is remaked.Igor M. Liplianin
The driver infrared remote code part is altered to switch to a work queue. Also ir_codes table moved to ir-common module for shared access. Signed-off-by: Igor M. Liplianin <liplianin@netup.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB(10738a): remove include/linux/video_encoder.hMauro Carvalho Chehab
include/linux/video_encoder.h is not used anymore by a v4l driver. Let's remove it and its occurences. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10727): adv7170: convert to v4l2_subdev.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10726): vpx3220: convert to v4l2_subdev.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10725): saa7185: convert to v4l2_subdev.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10724): saa7110: convert to v4l2_subdev.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> [mchehab@redhat.com: fix merge conflict with removal of v4l2_ctrl_query_fill_std()] Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10722): ks0127: convert to v4l2_subdev.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10721): bt856: convert to v4l2_subdev.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10719): bt819: convert to v4l2_subdev.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10718): bt866: convert to v4l2_subdev.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10698): v4l2-common: remove v4l2_ctrl_query_fill_stdHans Verkuil
The v4l2_ctrl_query_fill_std() function wasn't one the best idea I ever had. It doesn't add anything valuable that cannot be expressed equally well with v4l2_ctrl_query_fill and only adds overhead. Replace it with v4l2_ctrl_query_fill() everywhere it is used and remove it from v4l2_common.c. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10691): v4l2-common: add v4l2_i2c_subdev_addr()Hans Verkuil
Add small function to retrieve the i2c address from a v4l2_subdev pointer. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10686): v4l2: add V4L2_CTRL_FLAG_WRITE_ONLY flag.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10675): soc-camera: extend soc_camera_bus_param_compatible with ↵Guennadi Liakhovetski
more tests Add data signal polarity, mode, and bus-width tests to soc_camera_bus_param_compatible(). Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10671): sh_mobile_ceu: SOCAM flags are not platform dependentKuninori Morimoto
sh_mobile_ceu_camera.c support for signal polarity flags isn't platform dependent, provide them locally. Only the bus width is implementation specific. Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com> Acked-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10669): ov772x: Add image flip supportKuninori Morimoto
o ov772x_camera_info :: flags supports default image flip. o V4L2_CID_VFLIP/HFLIP supports image flip for user side. Thank Magnus for advice. Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10644): v4l2-subdev: rename dev field to v4l2_devHans Verkuil
Remain consistent in the naming: fields pointing to v4l2_device should be called v4l2_dev. There are too many device-like entities without adding to the confusion by mixing naming conventions. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30V4L/DVB (10643): v4l2-device: allow a NULL parent device when registering.Hans Verkuil
Some drivers (e.g. for ISA devices) have no parent device because there is no associated bus driver. Allow the parent device to be NULL in those cases when registering v4l2_device. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>