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Move the generic implementation to <linux/dma-mapping.h> now that all
architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now
that everyone supports them.
[valentinrothberg@gmail.com: remove leftovers in Kconfig]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Helge Deller <deller@gmx.de>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux
Pull fbdev updates from Tomi Valkeinen:
"Summary:
- pxafb: device-tree support
- An unsafe kernel parameter 'lockless_register_fb' for debugging
problems happening while inside the console lock
- Small miscellaneous fixes & cleanups
- omapdss: add writeback support functions
- Separation of omapfb and omapdrm (see below)
About the separation of omapfb and omapdrm, see
http://permalink.gmane.org/gmane.comp.video.dri.devel/143151
for longer story. The short version:
omapfb and omapdrm have shared low level drivers (omapdss and panel
drivers), making further development of omapdrm difficult. After
these patches omapfb and omapdrm have their own versions of the
drivers, which are more or less direct copies for now but will diverge
soon.
This also means that omapfb (everything under drivers/video/fbdev/omap2/)
is now in maintenance mode, and all new development will be done for
omapdrm (drivers/gpu/drm/omapdrm/)"
* tag 'fbdev-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (49 commits)
video: fbdev: pxafb: fix out of memory error path
drm/omap: make omapdrm select OMAP2_DSS
drm/omap: move omapdss & displays under omapdrm
omapfb: move vrfb into omapfb
omapfb: take omapfb's private omapdss into use
omapfb/displays: change CONFIG_DISPLAY_* to CONFIG_FB_OMAP2_*
omapfb/dss: change CONFIG_OMAP* to CONFIG_FB_OMAP*
omapdss: remove CONFIG_OMAP2_DSS_VENC from omapdss.h
omapfb: copy omapdss & displays for omapfb
omapfb: allow compilation only if DRM_OMAP is disabled
fbdev: omap2: panel-dpi: simplify gpio setting
fbdev: omap2: panel-dpi: in .disable first disable backlight then display
OMAPDSS: DSS: fix a warning message
video: omapdss: delete unneeded of_node_put
OMAPDSS: DISPC: Remove boolean comparisons
OMAPDSS: DSI: cleanup DSI_IRQ_ERROR_MASK define
OMAPDSS: remove extra out == NULL checks
OMAPDSS: change internal dispc functions to static
OMAPDSS: make a two dss feat funcs internal to omapdss
OMAPDSS: remove extra EXPORT_SYMBOLs
...
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omapfb's private copy of omapdss is now ready to be used.
This patch makes omapfb use its private omapdss and display drivers, and
also makes omap_vout (which uses omapfb) to depend on omapfb.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Acked-by: Rob Clark <robdclark@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij:
"Here is the bulk of GPIO changes for v4.5.
Notably there are big refactorings mostly by myself, aimed at getting
the gpio_chip into a shape that makes me believe I can proceed to
preserve state for a proper userspace ABI (character device) that has
already been proposed once, but resulted in the feedback that I need
to go back and restructure stuff. So I've been restructuring stuff.
On the way I ran into brokenness (return code from the get_value()
callback) and had to fix it. Also, refactored generic GPIO to be
simpler.
Some of that is still waiting to trickle down from the subsystems all
over the kernel that provide random gpio_chips, I've touched every
single GPIO driver in the kernel now, oh man I didn't know I was
responsible for so much...
Apart from that we're churning along as usual.
I took some effort to test and retest so it should merge nicely and we
shook out a couple of bugs in -next.
Infrastructural changes:
- In struct gpio_chip, rename the .dev node to .parent to better
reflect the fact that this is not the GPIO struct device
abstraction. We will add that soon so this would be totallt
confusing.
- It was noted that the driver .get_value() callbacks was sometimes
reporting negative -ERR values to the gpiolib core, expecting them
to be propagated to consumer gpiod_get_value() and gpio_get_value()
calls. This was not happening, so as there was a mess of drivers
returning negative errors and some returning "anything else than
zero" to indicate that a line was active. As some would have bit
31 set to indicate "line active" it clashed with negative error
codes. This is fixed by the largeish series clamping values in all
drivers with !!value to [0,1] and then augmenting the code to
propagate error codes to consumers. (Includes some ACKed patches
in other subsystems.)
- Add a void *data pointer to struct gpio_chip. The container_of()
design pattern is indeed very nice, but we want to reform the
struct gpio_chip to be a non-volative, stateless business, and keep
states internal to the gpiolib to be able to hold on to the state
when adding a proper userspace ABI (character device) further down
the road. To achieve this, drivers need a handle at the internal
state that is not dependent on their struct gpio_chip() so we add
gpiochip_add_data() and gpiochip_get_data() following the pattern
of many other subsystems. All the "use gpiochip data pointer"
patches transforms drivers to this scheme.
- The Generic GPIO chip header has been merged into the general
<linux/gpio/driver.h> header, and the custom header for that
removed. Instead of having a separate mm_gpio_chip struct for
these generic drivers, merge that into struct gpio_chip,
simplifying the code and removing the need for separate and
confusing includes.
Misc improvements:
- Stabilize the way GPIOs are looked up from the ACPI legacy
specification.
- Incremental driver features for PXA, PCA953X, Lantiq (patches from
the OpenWRT community), RCAR, Zynq, PL061, 104-idi-48
New drivers:
- Add a GPIO chip to the ALSA SoC AC97 driver.
- Add a new Broadcom NSP SoC driver (this lands in the pinctrl dir,
but the branch is merged here too to account for infrastructural
changes).
- The sx150x driver now supports the sx1502"
* tag 'gpio-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (220 commits)
gpio: generic: make bgpio_pdata always visible
gpiolib: fix chip order in gpio list
gpio: mpc8xxx: Do not use gpiochip_get_data() in mpc8xxx_gpio_save_regs()
gpio: mm-lantiq: Do not use gpiochip_get_data() in ltq_mm_save_regs()
gpio: brcmstb: Allow building driver for BMIPS_GENERIC
gpio: brcmstb: Set endian flags for big-endian MIPS
gpio: moxart: fix build regression
gpio: xilinx: Do not use gpiochip_get_data() in xgpio_save_regs()
leds: pca9532: use gpiochip data pointer
leds: tca6507: use gpiochip data pointer
hid: cp2112: use gpiochip data pointer
bcma: gpio: use gpiochip data pointer
avr32: gpio: use gpiochip data pointer
video: fbdev: via: use gpiochip data pointer
gpio: pch: Optimize pch_gpio_get()
Revert "pinctrl: lantiq: Implement gpio_chip.to_irq"
pinctrl: nsp-gpio: use gpiochip data pointer
pinctrl: vt8500-wmt: use gpiochip data pointer
pinctrl: exynos5440: use gpiochip data pointer
pinctrl: at91-pio4: use gpiochip data pointer
...
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Linux 4.4-rc6
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The name .dev in a struct is normally reserved for a struct device
that is let us say a superclass to the thing described by the struct.
struct gpio_chip stands out by confusingly using a struct device *dev
to point to the parent device (such as a platform_device) that
represents the hardware. As we want to give gpio_chip:s real devices,
this is not working. We need to rename this member to parent.
This was done by two coccinelle scripts, I guess it is possible to
combine them into one, but I don't know such stuff. They look like
this:
@@
struct gpio_chip *var;
@@
-var->dev
+var->parent
and:
@@
struct gpio_chip var;
@@
-var.dev
+var.parent
and:
@@
struct bgpio_chip *var;
@@
-var->gc.dev
+var->gc.parent
Plus a few instances of bgpio that I couldn't figure out how
to teach Coccinelle to rewrite.
This patch hits all over the place, but I *strongly* prefer this
solution to any piecemal approaches that just exercise patch
mechanics all over the place. It mainly hits drivers/gpio and
drivers/pinctrl which is my own backyard anyway.
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Rafał Miłecki <zajec5@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: Alek Du <alek.du@intel.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
floppy: make local variable non-static
exynos: fixes an incorrect header guard
dt-bindings: fixes some incorrect header guards
cpufreq-dt: correct dead link in documentation
cpufreq: ARM big LITTLE: correct dead link in documentation
treewide: Fix typos in printk
Documentation: filesystem: Fix typo in fs/eventfd.c
fs/super.c: use && instead of & for warn_on condition
Documentation: fix sysfs-ptp
lib: scatterlist: fix Kconfig description
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This patch fix multiple spelling typos found in
various part of kernel.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull second batch of media updates from Mauro Carvalho Chehab:
"This is the second part of the media patches. It contains the media
controller next generation patches, with is the result of one year of
discussions and development. It also contains patches to enable media
controller support at the DVB subsystem.
The goal is to improve the media controller to allow proper support
for other types of Video4Linux devices (radio and TV ones) and to
extend the media controller functionality to allow it to be used by
other subsystems like DVB, ALSA and IIO.
In order to use the new functionality, a new ioctl is needed
(MEDIA_IOC_G_TOPOLOGY). As we're still discussing how to pack the
struct fields of this ioctl in order to avoid compat32 issues, I
decided to add a patch at the end of this series commenting out the
new ioctl, in order to postpone the addition of the new ioctl to the
next Kernel version (4.6).
With that, no userspace visible changes should happen at the media
controller API, as the existing ioctls are untouched. Yet, it helps
DVB, ALSA and IIO developers to develop and test the patches adding
media controller support there, as the core will contain all required
internal changes to allow adding support for devices that belong to
those subsystems"
* tag 'media/v4.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (177 commits)
[media] Postpone the addition of MEDIA_IOC_G_TOPOLOGY
[media] mxl111sf: Add a tuner entity
[media] dvbdev: create links on devices with multiple frontends
[media] media-entitiy: add a function to create multiple links
[media] dvb-usb-v2: postpone removal of media_device
[media] dvbdev: Add RF connector if needed
[media] dvbdev: remove two dead functions if !CONFIG_MEDIA_CONTROLLER_DVB
[media] call media_device_init() before registering the V4L2 device
[media] uapi/media.h: Use u32 for the number of graph objects
[media] media-entity: don't sleep at media_device_register_entity()
[media] media-entity: increase max number of PADs
[media] media-entity.h: document the remaining functions
[media] media-device.h: use just one u32 counter for object ID
[media] media-entity.h fix documentation for several parameters
[media] DocBook: document media_entity_graph_walk_cleanup()
[media] move documentation to the header files
[media] media: Move MEDIA_ENTITY_MAX_PADS from media-entity.h to media-entity.c
[media] media: Remove pre-allocated entity enumeration bitmap
[media] staging: v4l: davinci_vpbe: Use the new media graph walk interface
[media] staging: v4l: omap4iss: Use the new media graph walk interface
...
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There are a few discussions left with regards to this ioctl:
1) the name of the new structs will contain _v2_ on it?
2) what's the best alternative to avoid compat32 issues?
Due to that, let's postpone the addition of this new ioctl to
the next Kernel version, to give people more time to discuss it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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While mxl111sf may have multiple frontends, it has just one
tuner. Reflect that on the media graph.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Devices like mxl111sf-based WinTV Aero-m have multiple
frontends, all linked on the same demod. Currently, the
dvb_create_graph() function is not smart enough to create
multiple links. Fix it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Sometimes, it is desired to create 1:n and n:1 or even
n:n links between different entities with the same
function.
This is actually needed to support DVB devices that
have multiple frontends. While we could do a function
like that internally at the DVB core, such function is
generic enough to be at media-entity, and it could be
useful on some other places.
So, add such function.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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We should not remove the media_device until its last usage,
or we may have use after free troubles.
So, move the per-adapter media_device removal to happen at
the end of the adapter removal code.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Several pure digital TV devices have a frontend with the tuner
integrated on it. Add the RF connector when dvb_create_media_graph()
is called on such devices.
Tested with siano and dvb_usb_mxl111sf drivers.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Those functions are used only if CONFIG_MEDIA_CONTROLLER_DVB.
Without that, if !CONFIG_MEDIA_CONTROLLER_DVB, it would produce
two warnings:
drivers/media/dvb-core/dvbdev.c:219:12: warning: 'dvb_create_tsout_entity' defined but not used [-Wunused-function]
static int dvb_create_tsout_entity(struct dvb_device *dvbdev,
^
drivers/media/dvb-core/dvbdev.c:264:12: warning: 'dvb_create_media_entity' defined but not used [-Wunused-function]
static int dvb_create_media_entity(struct dvb_device *dvbdev,
^
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Currently, v4l2_device_register() doesn't use the media_device
struct. So, calling media_device_init() could be called either
before or after v4l2_device_register().
Yet, it is a good practice to initialize everything before calling
the register functions. Also, the other drivers call
media_device_init() before registering the V4L2 device.
So, move the call for media_device_init() to happen earlier on
exynos4-is and s3c-camif.
This is just a cleanup patch.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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media_device_register_entity() is protected by a spin_lock.
Calling ida_pre_get() with GFP_KERNEL may put it to sleep,
with is a bad idea and causes this warning:
[ 8812.397195] BUG: sleeping function called from invalid context at mm/slub.c:1287
[ 8812.397203] in_atomic(): 1, irqs_disabled(): 0, pid: 15179, name: modprobe
[ 8812.397207] INFO: lockdep is turned off.
[ 8812.397213] CPU: 2 PID: 15179 Comm: modprobe Tainted: G B 4.4.0-rc2+ #41
[ 8812.397218] Hardware name: /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
[ 8812.397222] 0000000000000000 ffff880314c77268 ffffffff818f8ba7 ffff8803b17dde00
[ 8812.397232] ffff880314c77290 ffffffff811c2ee5 ffff8803b17dde00 ffffffff8284dbc9
[ 8812.397241] 0000000000000507 ffff880314c772d0 ffffffff811c30d5 0000000041b58ab3
[ 8812.397250] Call Trace:
[ 8812.397258] [<ffffffff818f8ba7>] dump_stack+0x4b/0x64
[ 8812.397265] [<ffffffff811c2ee5>] ___might_sleep+0x245/0x3a0
[ 8812.397270] [<ffffffff811c30d5>] __might_sleep+0x95/0x1a0
[ 8812.397276] [<ffffffff818fd083>] ? ida_pre_get+0x113/0x250
[ 8812.397282] [<ffffffff8153bb77>] kmem_cache_alloc+0x197/0x250
[ 8812.397288] [<ffffffff818fd083>] ida_pre_get+0x113/0x250
[ 8812.397293] [<ffffffff818fd265>] ida_simple_get+0xa5/0x170
[ 8812.397298] [<ffffffff818fd1c0>] ? ida_pre_get+0x250/0x250
[ 8812.397306] [<ffffffffa07382d1>] media_device_register_entity+0x171/0x420 [media]
[ 8812.397318] [<ffffffffa129e76f>] v4l2_device_register_subdev+0x34f/0x640 [videodev]
[ 8812.397324] [<ffffffffa0768dea>] v4l2_i2c_new_subdev_board+0x12a/0x250 [v4l2_common]
[ 8812.397330] [<ffffffffa0768fe7>] v4l2_i2c_new_subdev+0xd7/0x110 [v4l2_common]
[ 8812.397337] [<ffffffffa0768f10>] ? v4l2_i2c_new_subdev_board+0x250/0x250 [v4l2_common]
[ 8812.397347] [<ffffffffa13d2f76>] au0828_card_analog_fe_setup+0x2e6/0x3f0 [au0828]
[ 8812.397352] [<ffffffff814450cc>] ? power_down+0xc4/0xc4
[ 8812.397361] [<ffffffffa13d2c90>] ? au0828_tuner_callback+0x160/0x160 [au0828]
[ 8812.397370] [<ffffffffa13d319f>] au0828_card_setup+0x11f/0x340 [au0828]
[ 8812.397378] [<ffffffffa13d3080>] ? au0828_card_analog_fe_setup+0x3f0/0x3f0 [au0828]
[ 8812.397384] [<ffffffff812a575b>] ? msleep+0x7b/0xc0
[ 8812.397393] [<ffffffffa13d0d79>] au0828_usb_probe+0x679/0xcf0 [au0828]
[ 8812.397399] [<ffffffff81d7619d>] usb_probe_interface+0x45d/0x940
[ 8812.397406] [<ffffffff81ca7004>] driver_probe_device+0x454/0xd90
[ 8812.397411] [<ffffffff81ca7940>] ? driver_probe_device+0xd90/0xd90
[ 8812.397417] [<ffffffff81ca7940>] ? driver_probe_device+0xd90/0xd90
[ 8812.397422] [<ffffffff81ca7a61>] __driver_attach+0x121/0x160
[ 8812.397427] [<ffffffff81ca141f>] bus_for_each_dev+0x11f/0x1a0
[ 8812.397433] [<ffffffff81ca1300>] ? subsys_dev_iter_exit+0x10/0x10
[ 8812.397439] [<ffffffff822917d7>] ? _raw_spin_unlock+0x27/0x40
[ 8812.397445] [<ffffffff81ca5d4d>] driver_attach+0x3d/0x50
[ 8812.397450] [<ffffffff81ca5039>] bus_add_driver+0x4c9/0x770
[ 8812.397456] [<ffffffff81ca944c>] driver_register+0x18c/0x3b0
[ 8812.397462] [<ffffffff8124c952>] ? __raw_spin_lock_init+0x32/0x100
[ 8812.397468] [<ffffffff81d71e58>] usb_register_driver+0x1f8/0x440
[ 8812.397473] [<ffffffffa0208000>] ? 0xffffffffa0208000
[ 8812.397481] [<ffffffffa02080b7>] au0828_init+0xb7/0x1000 [au0828]
[ 8812.397486] [<ffffffff810021b1>] do_one_initcall+0x141/0x300
[ 8812.397492] [<ffffffff81002070>] ? try_to_run_init_process+0x40/0x40
[ 8812.397497] [<ffffffff8123bbf6>] ? trace_hardirqs_on_caller+0x16/0x590
[ 8812.397502] [<ffffffff815406e6>] ? kasan_unpoison_shadow+0x36/0x50
[ 8812.397507] [<ffffffff815406e6>] ? kasan_unpoison_shadow+0x36/0x50
[ 8812.397512] [<ffffffff815406e6>] ? kasan_unpoison_shadow+0x36/0x50
[ 8812.397517] [<ffffffff815407f7>] ? __asan_register_globals+0x87/0xa0
[ 8812.397524] [<ffffffff814454e5>] do_init_module+0x1d0/0x5a4
[ 8812.397530] [<ffffffff812ed7e8>] load_module+0x6648/0x9d70
[ 8812.397535] [<ffffffff812e4b70>] ? symbol_put_addr+0x50/0x50
[ 8812.397546] [<ffffffff812e71a0>] ? module_frob_arch_sections+0x20/0x20
[ 8812.397552] [<ffffffff8158e950>] ? open_exec+0x50/0x50
[ 8812.397559] [<ffffffff811648db>] ? ns_capable+0x5b/0xd0
[ 8812.397565] [<ffffffff812f1208>] SyS_finit_module+0x108/0x130
[ 8812.397571] [<ffffffff812f1100>] ? SyS_init_module+0x1f0/0x1f0
[ 8812.397576] [<ffffffff81004044>] ? lockdep_sys_exit_thunk+0x12/0x14
[ 8812.397582] [<ffffffff82292236>] entry_SYSCALL_64_fastpath+0x16/0x7a
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The DVB drivers may have 257 PADs. Get the next power of two
that would accomodate that amount.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Instead of using one u32 counter per type for object IDs, use
just one counter. With such change, it makes sense to simplify
the debug logs too.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Some exported functions were still documented at the .c file,
instead of documenting at the .h one.
Move the documentation to the right place, as we only use headers
at media device-drivers.xml DocBook.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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This isn't really a part of any interface drivers are expected to use. In
order to keep drivers from using it, hide it in media-entity.c. This was
always an arbitrary number and should be removed in the long run.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The bitmaps for entity enumerations used to be statically allocated. Now
that the drivers have been converted to use the new interface which
explicitly initialises the enum objects, drop the pre-allocated bitmaps.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Instead of using a bitmap directly in a driver, use the new media entity
enumeration interface to perform the same.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Instead of using a bitmap directly in a driver, use the new media entity
enumeration interface to perform the same.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Initialise a given graph walk object once, and then keep using it whilst
the same pipeline is running. Once the pipeline is stopped, release the
graph walk object.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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This will also mean that the necessary graph related data structures will
be allocated dynamically, removing the need for maximum ID checks.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The media graph walk requires initialisation and cleanup soon. Update the
users to perform the soon necessary API calls.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The media graph walk requires initialisation and cleanup soon. Update the
users to perform the soon necessary API calls.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Hyun Kwon <hyun.kwon@xilinx.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The media graph walk requires initialisation and cleanup soon. Update the
users to perform the soon necessary API calls.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Javier Martinez Canillas <javier@osg.samsung.com>
Cc: Kamil Debski <k.debski@samsung.com>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The media graph walk requires initialisation and cleanup soon. Update the
users to perform the soon necessary API calls.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The media graph walk requires initialisation and cleanup soon. Update the
users to perform the soon necessary API calls.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Add media_entity_graph_walk_init() and media_entity_graph_walk_cleanup()
functions in order to dynamically allocate memory for the graph. This is
not done in media_entity_graph_walk_start() as there are situations where
e.g. correct error handling, that itself may not fail, requires successful
graph walk.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The struct media_entity_graph was allocated in the stack, limiting the
number of entities that could be reasonably allocated. Instead, move the
struct to struct media_pipeline which is typically allocated using
kmalloc() instead.
The intent is to keep the enumeration around for later use for the
duration of the streaming. As streaming is eventually stopped, an
unfortunate memory allocation failure would prevent stopping the
streaming. As no memory will need to be allocated, the problem is avoided
altogether.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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This is useful in e.g. knowing whether certain operations have already
been performed for an entity. The users include the framework itself (for
graph walking) and a number of drivers.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The internal index can be used internally by the framework in order to keep
track of entities for a purpose or another. The internal index is constant
while it's registered to a media device, but the same index may be re-used
once the entity having that index is unregistered.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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We need to set "err = -ENOMEM" here.
Fixes: 38b11f19667a ('[media] v4l2-core: create MC interfaces for devnodes')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The copy_to/from_user() functions return the number of bytes *not*
copied. They don't return error codes.
Fixes: 4f6b3f363475 ('media] media-device: add support for MEDIA_IOC_G_TOPOLOGY ioctl')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The G_TOPOLOGY ioctl is used to get a graph topology and since in the
future a graph can be dynamically updated, there is a way to know the
topology version so userspace can be aware that the graph has changed.
The version 0 is reserved to indicate that the graph is static (i.e no
graphs updates since the media device was registered).
So, now that the media device initialization and registration has been
split and the media device node is not exposed to user-space until all
the entities have been registered and links created, it is safe to set
a topology version 0 in media_device_register().
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Suggested-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Registering a V4L2 sub-device includes, among other things, registering
the related media entity and calling the sub-device's registered op. Since
patch "media: convert links from array to list", creating a link between
two pads requires registering the entity first. If the registered() op
involves link creation, the link list head will not be initialised before
it is used.
Resolve this by first registering the entity, then calling its
registered() op.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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There are now two new warnings:
drivers/media/usb/dvb-usb-v2/dvb_usb_core.c: In function 'dvb_usbv2_media_device_register':
drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:433:2: warning: ignoring return value of '__media_device_register', declared with attribute warn_unused_result [-Wunused-result]
media_device_register(adap->dvb_adap.mdev);
^
drivers/media/usb/dvb-usb/dvb-usb-dvb.c: In function 'dvb_usb_media_device_register':
drivers/media/usb/dvb-usb/dvb-usb-dvb.c:128:2: warning: ignoring return value of '__media_device_register', declared with attribute warn_unused_result [-Wunused-result]
media_device_register(adap->dvb_adap.mdev);
^
Those are because the drivers are not properly checking if the
media device init and register were succeeded.
Fix it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The media device node is registered and so made visible to user-space
before entities are registered and links created which means that the
media graph obtained by user-space could be only partially enumerated
if that happens too early before all the graph has been created.
To avoid this race condition, split the media init and registration
in separate functions and only register the media device node when
all the pending subdevices have been registered, either explicitly
by the driver or asynchronously using v4l2_async_register_subdev().
The media_device_register() had a check for drivers not filling dev
and model fields but all drivers in mainline set them and not doing
it will be a driver bug so change the function return to void and
add a BUG_ON() for dev being NULL instead.
Also, add a media_device_cleanup() function that will destroy the
graph_mutex that is initialized in media_device_init().
[mchehab@osg.samsung.com: Fix compilation if !CONFIG_MEDIA_CONTROLLER
and remove two warnings added by this changeset]
Suggested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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If media_device_unregister() is called by two different
drivers, a race condition may happen, as the check if the
device is not registered is not protected.
Move the spin_lock() to happen earlier in the function, in order
to prevent such race condition.
Reported-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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media entity register and unregister functions are called by media
device register/unregister. Move them to occur earlier, as we'll need
an unlocked version of media_device_entity_unregister() and we don't
want to add a function prototype without needing it.
No functional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Most media functions that unregister, check if the corresponding register
function succeed before. So these functions can safely be called even if a
registration was never made or the component as already been unregistered.
Add the same check to media_device_unregister() function for consistency.
This will also allow to split the media_device_register() function in an
initialization and registration functions without the need to change the
generic cleanup functions and error code paths for all the media drivers.
Suggested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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As pointed by Dan, the commit f8fd4c61b5ae ("[media] media-entity:
protect object creation/removal using spin lock")' leads to the
following static checker warning:
drivers/media/media-entity.c:781 media_remove_intf_link()
error: dereferencing freed memory 'link'
drivers/media/media-entity.c
777 void media_remove_intf_link(struct media_link *link)
778 {
779 spin_lock(&link->graph_obj.mdev->lock);
780 __media_remove_intf_link(link);
781 spin_unlock(&link->graph_obj.mdev->lock);
In practice, I didn't see any troubles even with KASAN enabled. I guess
gcc optimizer internally cached the mdev reference, instead of getting
it twice. Yet, it is a very bad idea to rely on such optimization. So,
let's fix the code.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Changeset f8fd4c61b5ae ("[media] media-entity: protect object
creation/removal using spin lock") changed the object creation/removal
protection to spin lock, as this is what's used on media-device,
keeping the mutex reserved for graph traversal routines. However, it
also changed the link setup, by mistake.
This could cause troubles, as the link setup can affect the graph
traversal, and this is likely the reason for a mutex there.
So, revert media_entity_setup_link() to use mutex.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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As we're using the headers file only for documentation, move the
two kernel-doc macros to the header, and fix it to avoid
warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Add kernel-doc documentation for media_device_get_devres and
media_device_find_devres.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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If a different entity->pipe in a pipeline was encountered, a warning was
issued but the execution continued as if nothing had happened. Return an
error instead right there.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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