The bus related static data included in the vpfe_fmt
static table can be derived dynamically instead.
This simplify the table and it's use.
We instead replace the per bus data info with just
the usual bit per pixel value for each supported
pixel format.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
The try_fmt was not actually trying out the provided format
but merely returning the current format basically like get_fmt.
In addition set_fmt should first invoked try_fmt to validate the
given format before applying it to the hardware.
To fix all of these the whole get/try/set ioctl functions had to
be reworked.
When calculating the bytesperline/stride and sizeimage format
member we don't need to locally store the current value of
bytesperpixel as it can easily get derived dynamically.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
checkpatch.pl nows reports several:
WARNING: Prefer using '"%s...", __func__' to using '<function name>',
this function's name, in a string.
So fix these for the whole driver.
At the same time remove the function entry trace log as those can be
enabled using ftrace instead.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Using a statically defined format array would cause issue when
multiple vpfe instance would be connected to sub-device of
different capabilities. We need to use an instance based array
instead to properly maintain a per port/instance format list.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
VIDIOC_S_STD should not return an error if the value is identical
to the current one.
This error was highlighted by the v4l2-compliance test.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Returning queued vb2 buffers back to user space is a common
task best handled by a helper function.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
When start_streaming fails the h/w module might be left enabled
inadvertently. Make sure it is disabled in the error path.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
We were originally attempting to stop all processing as soon
as possible, but the in-progress DMA operation cannot be canceled.
This led to the module being in a busy state and prevented proper
power management functionality.
The existing implementation would attempt to clean things up by waiting
up to 50ms. However when receiving video frame at 15fps or lower,
it meant an inter frame arrival rate of 66.6 ms or higher.
In such cases upon tear down the following message could be seen:
omap_hwmod: vpfe0: _wait_target_disable failed
This patch fixes this issue by adding a stopping state where
we would wait for the next Vsync before disabling the hardware.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Previous generation of this driver were hard coded to handle
encoder/decoder where the first line never contains any data and
was therefore always skipped, however when dealing with actual
camera sensors the first line is always present.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Currently if vpfe is not active then it returns immediately in the
suspend and resume handlers. Change this so that it always performs the
pinctrl config so that we can still get proper sleep state configuration
on the pins even if we do not need to worry about fully saving and
restoring context.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
After practically re-writing the driver to collpase it into a monolith,
I am adding myself as a reviewer for vimc driver.
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
vimc driver is now a monolithic driver. Update the module parameter
usage information to reflect that.
[m.chehab+samsung@kernel.org: fix two warnings due to wrontly added spaces]
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Move duplicated IS_SRC and IS_SINK dfines to common header. Rename
them to VIMC_IS_SRC and VIM_IS_SINK.
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
vimc uses Component API to split the driver into functional components.
The real hardware resembles a monolith structure than component and
component structure added a level of complexity making it hard to
maintain without adding any real benefit.
The sensor is one vimc component that would makes sense to be a separate
module to closely align with the real hardware. It would be easier to
collapse vimc into single monolithic driver first and then split the
sensor off as a separate module.
Collapse it into a single monolithic driver removing the Component API.
This patch removes the component API and makes minimal changes to the
code base preserving the functional division of the code structure.
Preserving the functional structure allows us to split the sensor off
as a separate module in the future.
Major design elements in this change are:
- Use existing struct vimc_ent_config and struct vimc_pipeline_config
to drive the initialization of the functional components.
- Make vimc_device and vimc_ent_config global by moving them to
vimc-common.h
- Add two new hooks add and rm to initialize and register, unregister
and free subdevs.
- All component API is now gone and bind and unbind hooks are modified
to do "add" and "rm" with minimal changes to just add and rm subdevs.
- vimc-core's bind and unbind are now register and unregister.
- Add a new field to vimc_device structure for saving the pointers to
struct vimc_ent_device(s) subdevs create in their "add" hooks. These
get used to create links and removing the subdevs. vimc-core allocates
this array which sized to number of entries in the topology defined in
the vimc_pipeline_config structure.
- vimc-core invokes "add" hooks from its vimc_register_devices().
The "add" hooks remain the same and register subdevs. They don't
create platform devices of their own and use vimc's pdev.dev as
their reference device. Each "add" hook returns pointer to its struct
vimc_ent_device. This is saved in the vimc_device ent_devs array.
- vimc-core invokes "rm" hooks from its unregister to unregister subdevs
and cleanup.
- vimc-core invokes "add" and "rm" hooks with pointer to struct vimc_device
and the corresponding vimc_ent_device saved in the ent_devs.
The following configure and stream test works on all devices.
media-ctl -d platform:vimc -V '"Sensor A":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d platform:vimc -V '"Debayer A":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d platform:vimc -V '"Sensor B":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d platform:vimc -V '"Debayer B":0[fmt:SBGGR8_1X8/640x480]'
v4l2-ctl -z platform:vimc -d "RGB/YUV Capture" -v width=1920,height=1440
v4l2-ctl -z platform:vimc -d "Raw Capture 0" -v pixelformat=BA81
v4l2-ctl -z platform:vimc -d "Raw Capture 1" -v pixelformat=BA81
v4l2-ctl --stream-mmap --stream-count=100 -d /dev/video1
v4l2-ctl --stream-mmap --stream-count=100 -d /dev/video2
v4l2-ctl --stream-mmap --stream-count=100 -d /dev/video3
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
In media_device_register_entity, if media_graph_walk_init fails,
need to free the previously memory.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Don't populate the array init_regs on the stack but instead make it
static. Makes the object code smaller by 57 bytes.
Before:
text data bss dec hex filename
15935 3600 128 19663 4ccf drivers/media/i2c/mt9m001.o
After:
text data bss dec hex filename
15782 3696 128 19606 4c96 drivers/media/i2c/mt9m001.o
(gcc version 9.2.1, amd64)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
-----BEGIN PGP SIGNATURE-----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=2UM7
-----END PGP SIGNATURE-----
Merge tag 'for-5.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"A bunch of fixes that accumulated in recent weeks, mostly material for
stable.
Summary:
- fix for regression from 5.3 that prevents to use balance convert
with single profile
- qgroup fixes: rescan race, accounting leak with multiple writers,
potential leak after io failure recovery
- fix for use after free in relocation (reported by KASAN)
- other error handling fixups"
* tag 'for-5.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: qgroup: Fix reserved data space leak if we have multiple reserve calls
btrfs: qgroup: Fix the wrong target io_tree when freeing reserved data space
btrfs: Fix a regression which we can't convert to SINGLE profile
btrfs: relocation: fix use-after-free on dead relocation roots
Btrfs: fix race setting up and completing qgroup rescan workers
Btrfs: fix missing error return if writeback for extent buffer never started
btrfs: adjust dirty_metadata_bytes after writeback failure of extent buffer
Btrfs: fix selftests failure due to uninitialized i_mode in test inodes
A few fixes that have trickled in through the merge window:
- Video fixes for OMAP due to panel-dpi driver removal
- Clock fixes for OMAP that broke no-idle quirks + nfsroot on DRA7
- Fixing arch version on ASpeed ast2500
- Two fixes for reset handling on ARM SCMI
-----BEGIN PGP SIGNATURE-----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=s4qF
-----END PGP SIGNATURE-----
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC fixes from Olof Johansson:
"A few fixes that have trickled in through the merge window:
- Video fixes for OMAP due to panel-dpi driver removal
- Clock fixes for OMAP that broke no-idle quirks + nfsroot on DRA7
- Fixing arch version on ASpeed ast2500
- Two fixes for reset handling on ARM SCMI"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
ARM: aspeed: ast2500 is ARMv6K
reset: reset-scmi: add missing handle initialisation
firmware: arm_scmi: reset: fix reset_state assignment in scmi_domain_reset
bus: ti-sysc: Remove unpaired sysc_clkdm_deny_idle()
ARM: dts: logicpd-som-lv: Fix i2c2 and i2c3 Pin mux
ARM: dts: am3517-evm: Fix missing video
ARM: dts: logicpd-torpedo-baseboard: Fix missing video
ARM: omap2plus_defconfig: Fix missing video
bus: ti-sysc: Fix handling of invalid clocks
bus: ti-sysc: Fix clock handling for no-idle quirks
- Fixed a buffer overflow by checking nr_args correctly in probes
- Fixed a warning that is reported by clang
- Fixed a possible memory leak in error path of filter processing
- Fixed the selftest that checks for failures, but wasn't failing
- Minor clean up on call site output of a memory trace event
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCXZEP5hQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qhrSAQDlws8rY/vJN4tKL1YaBTRyS5OW+1B+
LPLOxm9PBuzt0wEArVunv7iMgvRzp5spbmCqmD8Is2vSf+45KSrb10WU2wo=
=L37R
-----END PGP SIGNATURE-----
Merge tag 'trace-v5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"A few more tracing fixes:
- Fix a buffer overflow by checking nr_args correctly in probes
- Fix a warning that is reported by clang
- Fix a possible memory leak in error path of filter processing
- Fix the selftest that checks for failures, but wasn't failing
- Minor clean up on call site output of a memory trace event"
* tag 'trace-v5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
selftests/ftrace: Fix same probe error test
mm, tracing: Print symbol name for call_site in trace events
tracing: Have error path in predicate_parse() free its allocated memory
tracing: Fix clang -Wint-in-bool-context warnings in IF_ASSIGN macro
tracing/probe: Fix to check the difference of nr_args before adding probe
Move the static keyword to the front of declaration of
csky_pmu_of_device_ids, and resolve the following compiler
warning that can be seen when building with warnings
enabled (W=1):
arch/csky/kernel/perf_event.c:1340:1: warning:
‘static’ is not at beginning of declaration [-Wold-style-declaration]
Signed-off-by: Krzysztof Wilczynski <kw@linux.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Since the enabling and disabling of IRQs within preempt_schedule_irq()
is contained in a need_resched() loop, we don't need the outer arch
code loop.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Here are 2 small Documentation/process/embargoed-hardware-issues.rst
file updates that missed my previous char/misc pull request for 5.4-rc1.
The first one adds an Intel representative for the process, and the
second one cleans up the text a bit more when it comes to how the
disclosure rules work, as it was a bit confusing to some companies.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXZCMVg8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ymk1QCfarO6D7Wj/eg/BPSSkP/dgaLMog8AoLBJiBmz
2ErEIjIqV0J/e3QYud8G
=qUtH
-----END PGP SIGNATURE-----
Merge tag 'char-misc-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull Documentation/process update from Greg KH:
"Here are two small Documentation/process/embargoed-hardware-issues.rst
file updates that missed my previous char/misc pull request.
The first one adds an Intel representative for the process, and the
second one cleans up the text a bit more when it comes to how the
disclosure rules work, as it was a bit confusing to some companies"
* tag 'char-misc-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
Documentation/process: Clarify disclosure rules
Documentation/process: Volunteer as the ambassador for Intel
Pull more vfs updates from Al Viro:
"A couple of misc patches"
* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
afs dynroot: switch to simple_dir_operations
fs/handle.c - fix up kerneldoc
-----BEGIN PGP SIGNATURE-----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=o1/m
-----END PGP SIGNATURE-----
Merge tag '5.4-rc-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull more cifs updates from Steve French:
"Fixes from the recent SMB3 Test events and Storage Developer
Conference (held the last two weeks).
Here are nine smb3 patches including an important patch for debugging
traces with wireshark, with three patches marked for stable.
Additional fixes from last week to better handle some newly discovered
reparse points, and a fix the create/mkdir path for setting the mode
more atomically (in SMB3 Create security descriptor context), and one
for path name processing are still being tested so are not included
here"
* tag '5.4-rc-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
CIFS: Fix oplock handling for SMB 2.1+ protocols
smb3: missing ACL related flags
smb3: pass mode bits into create calls
smb3: Add missing reparse tags
CIFS: fix max ea value size
fs/cifs/sess.c: Remove set but not used variable 'capabilities'
fs/cifs/smb2pdu.c: Make SMB2_notify_init static
smb3: fix leak in "open on server" perf counter
smb3: allow decryption keys to be dumped by admin for debugging
The csky_pmu.max_period has type u64, and BIT() can only return
32 bits unsigned long on C-SKY. The initialization for max_period
will be incorrect when count_width is bigger than 32.
Use BIT_ULL()
Signed-off-by: Mao Han <han_mao@c-sky.com>
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
We need set fp zero to let backtrace know the end. The patch fixup perf
callchain panic problem, because backtrace didn't know what is the end
of fp.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reported-by: Mao Han <han_mao@c-sky.com>
The csky implementation of free_initrd_mem() is an open-coded version of
free_reserved_area() without poisoning.
Remove it and make csky use the generic version of free_initrd_mem().
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Merge active entropy generation updates.
This is admittedly partly "for discussion". We need to have a way
forward for the boot time deadlocks where user space ends up waiting for
more entropy, but no entropy is forthcoming because the system is
entirely idle just waiting for something to happen.
While this was triggered by what is arguably a user space bug with
GDM/gnome-session asking for secure randomness during early boot, when
they didn't even need any such truly secure thing, the issue ends up
being that our "getrandom()" interface is prone to that kind of
confusion, because people don't think very hard about whether they want
to block for sufficient amounts of entropy.
The approach here-in is to decide to not just passively wait for entropy
to happen, but to start actively collecting it if it is missing. This
is not necessarily always possible, but if the architecture has a CPU
cycle counter, there is a fair amount of noise in the exact timings of
reasonably complex loads.
We may end up tweaking the load and the entropy estimates, but this
should be at least a reasonable starting point.
As part of this, we also revert the revert of the ext4 IO pattern
improvement that ended up triggering the reported lack of external
entropy.
* getrandom() active entropy waiting:
Revert "Revert "ext4: make __ext4_get_inode_loc plug""
random: try to actively add entropy rather than passively wait for it
This reverts commit 72dbcf7215.
Instead of waiting forever for entropy that may just not happen, we now
try to actively generate entropy when required, and are thus hopefully
avoiding the problem that caused the nice ext4 IO pattern fix to be
reverted.
So revert the revert.
Cc: Ahmed S. Darwish <darwish.07@gmail.com>
Cc: Ted Ts'o <tytso@mit.edu>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Alexander E. Patrakov <patrakov@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For 5.3 we had to revert a nice ext4 IO pattern improvement, because it
caused a bootup regression due to lack of entropy at bootup together
with arguably broken user space that was asking for secure random
numbers when it really didn't need to.
See commit 72dbcf7215 (Revert "ext4: make __ext4_get_inode_loc plug").
This aims to solve the issue by actively generating entropy noise using
the CPU cycle counter when waiting for the random number generator to
initialize. This only works when you have a high-frequency time stamp
counter available, but that's the case on all modern x86 CPU's, and on
most other modern CPU's too.
What we do is to generate jitter entropy from the CPU cycle counter
under a somewhat complex load: calling the scheduler while also
guaranteeing a certain amount of timing noise by also triggering a
timer.
I'm sure we can tweak this, and that people will want to look at other
alternatives, but there's been a number of papers written on jitter
entropy, and this should really be fairly conservative by crediting one
bit of entropy for every timer-induced jump in the cycle counter. Not
because the timer itself would be all that unpredictable, but because
the interaction between the timer and the loop is going to be.
Even if (and perhaps particularly if) the timer actually happens on
another CPU, the cacheline interaction between the loop that reads the
cycle counter and the timer itself firing is going to add perturbations
to the cycle counter values that get mixed into the entropy pool.
As Thomas pointed out, with a modern out-of-order CPU, even quite simple
loops show a fair amount of hard-to-predict timing variability even in
the absense of external interrupts. But this tries to take that further
by actually having a fairly complex interaction.
This is not going to solve the entropy issue for architectures that have
no CPU cycle counter, but it's not clear how (and if) that is solvable,
and the hardware in question is largely starting to be irrelevant. And
by doing this we can at least avoid some of the even more contentious
approaches (like making the entropy waiting time out in order to avoid
the possibly unbounded waiting).
Cc: Ahmed Darwish <darwish.07@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Nicholas Mc Guire <hofrat@opentech.at>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Alexander E. Patrakov <patrakov@gmail.com>
Cc: Lennart Poettering <mzxreary@0pointer.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes for omap variants
Few fixes for ti-sysc interconnect target module driver for no-idle
quirks that caused nfsroot to fail on some dra7 boards.
And let's fixes to get LCD working again for logicpd board that got
broken a while back with removal of panel-dpi driver. We need to now
use generic CONFIG_DRM_PANEL_SIMPLE instead.
* tag 'fixes-5.4-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
bus: ti-sysc: Remove unpaired sysc_clkdm_deny_idle()
ARM: dts: logicpd-som-lv: Fix i2c2 and i2c3 Pin mux
ARM: dts: am3517-evm: Fix missing video
ARM: dts: logicpd-torpedo-baseboard: Fix missing video
ARM: omap2plus_defconfig: Fix missing video
bus: ti-sysc: Fix handling of invalid clocks
bus: ti-sysc: Fix clock handling for no-idle quirks
Link: https://lore.kernel.org/r/pull-1568819401-72461@atomide.com
Signed-off-by: Olof Johansson <olof@lixom.net>
Couple of fixes: one in scmi reset driver initialising missed scmi handle
and an other in scmi reset API implementation fixing the assignment of
reset state
-----BEGIN PGP SIGNATURE-----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=FmDn
-----END PGP SIGNATURE-----
Merge tag 'scmi-fixes-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into arm/fixes
ARM SCMI fixes for v5.4
Couple of fixes: one in scmi reset driver initialising missed scmi handle
and an other in scmi reset API implementation fixing the assignment of
reset state
* tag 'scmi-fixes-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
reset: reset-scmi: add missing handle initialisation
firmware: arm_scmi: reset: fix reset_state assignment in scmi_domain_reset
Link: https://lore.kernel.org/r/20190918142139.GA4370@bogus
Signed-off-by: Olof Johansson <olof@lixom.net>
- Complete the reworks to interoperate with powerpc dynamic huge page sizes
- Fix a crash due to missed accounting for the powerpc 'struct
page'-memmap mapping granularity.
- Fix badblock initialization for volatile (DRAM emulated) pmem ranges.
- Stop triggering request_key() notifications to userspace when
NVDIMM-security is disabled / not present.
- Miscellaneous small fixups.
-----BEGIN PGP SIGNATURE-----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=Z6Fa
-----END PGP SIGNATURE-----
Merge tag 'libnvdimm-fixes-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
More libnvdimm updates from Dan Williams:
- Complete the reworks to interoperate with powerpc dynamic huge page
sizes
- Fix a crash due to missed accounting for the powerpc 'struct
page'-memmap mapping granularity
- Fix badblock initialization for volatile (DRAM emulated) pmem ranges
- Stop triggering request_key() notifications to userspace when
NVDIMM-security is disabled / not present
- Miscellaneous small fixups
* tag 'libnvdimm-fixes-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
libnvdimm/region: Enable MAP_SYNC for volatile regions
libnvdimm: prevent nvdimm from requesting key when security is disabled
libnvdimm/region: Initialize bad block for volatile namespaces
libnvdimm/nfit_test: Fix acpi_handle redefinition
libnvdimm/altmap: Track namespace boundaries in altmap
libnvdimm: Fix endian conversion issues
libnvdimm/dax: Pick the right alignment default when creating dax devices
powerpc/book3s64: Export has_transparent_hugepage() related functions.
Pull thermal SoC updates from Eduardo Valentin:
"This is a really small pull in the midst of a lot of pending patches.
We are in the middle of restructuring how we are maintaining the
thermal subsystem, as per discussion in our last LPC. For now, I am
sending just some changes that were pending in my tree. Looking
forward to get a more streamlined process in the next merge window"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
thermal: db8500: Rewrite to be a pure OF sensor
thermal: db8500: Use dev helper variable
thermal: db8500: Finalize device tree conversion
thermal: thermal_mmio: remove some dead code
Pull more i2c updates from Wolfram Sang:
- make Lenovo Yoga C630 boot now that the dependencies are merged
- restore BlockProcessCall for i801, accidently removed in this merge
window
- a bugfix for the riic driver
- an improvement to the slave-eeprom driver which should have been in
the first pull request but sadly got lost in the process
* 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: slave-eeprom: Add read only mode
i2c: i801: Bring back Block Process Call support for certain platforms
i2c: riic: Clear NACK in tend isr
i2c: qcom-geni: Disable DMA processing on the Lenovo Yoga C630
A couple of fixes for the AMD IOMMU driver have piled up:
* Some fixes for the reworked IO page-table which caused memory
leaks or did not allow to downgrade mappings under some
conditions.
* Locking fixes to fix a couple of possible races around
accessing 'struct protection_domain'. The races got introduced
when the dma-ops path became lock-less in the fast-path.
-----BEGIN PGP SIGNATURE-----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=xajX
-----END PGP SIGNATURE-----
Merge tag 'iommu-fixes-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu fixes from Joerg Roedel:
"A couple of fixes for the AMD IOMMU driver have piled up:
- Some fixes for the reworked IO page-table which caused memory leaks
or did not allow to downgrade mappings under some conditions.
- Locking fixes to fix a couple of possible races around accessing
'struct protection_domain'. The races got introduced when the
dma-ops path became lock-less in the fast-path"
* tag 'iommu-fixes-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Lock code paths traversing protection_domain->dev_list
iommu/amd: Lock dev_data in attach/detach code paths
iommu/amd: Check for busy devices earlier in attach_device()
iommu/amd: Take domain->lock for complete attach/detach path
iommu/amd: Remove amd_iommu_devtable_lock
iommu/amd: Remove domain->updated
iommu/amd: Wait for completion of IOTLB flush in attach_device
iommu/amd: Unmap all L7 PTEs when downgrading page-sizes
iommu/amd: Introduce first_pte_l7() helper
iommu/amd: Fix downgrading default page-sizes in alloc_pte()
iommu/amd: Fix pages leak in free_pagetable()
The role of the contact list provided by the disclosing party and how it
affects the disclosure process and the ability to include experts into
the development process is not really well explained.
Neither is it entirely clear when the disclosing party will be informed
about the fact that a developer who is not covered by an employer NDA needs
to be brought in and disclosed.
Explain the role of the contact list and the information policy along with
an eventual conflict resolution better.
Reported-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.1909251028390.10825@nanos.tec.linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pull networking fixes from David Miller:
1) Sanity check URB networking device parameters to avoid divide by
zero, from Oliver Neukum.
2) Disable global multicast filter in NCSI, otherwise LLDP and IPV6
don't work properly. Longer term this needs a better fix tho. From
Vijay Khemka.
3) Small fixes to selftests (use ping when ping6 is not present, etc.)
from David Ahern.
4) Bring back rt_uses_gateway member of struct rtable, it's semantics
were not well understood and trying to remove it broke things. From
David Ahern.
5) Move usbnet snaity checking, ignore endpoints with invalid
wMaxPacketSize. From Bjørn Mork.
6) Missing Kconfig deps for sja1105 driver, from Mao Wenan.
7) Various small fixes to the mlx5 DR steering code, from Alaa Hleihel,
Alex Vesker, and Yevgeny Kliteynik
8) Missing CAP_NET_RAW checks in various places, from Ori Nimron.
9) Fix crash when removing sch_cbs entry while offloading is enabled,
from Vinicius Costa Gomes.
10) Signedness bug fixes, generally in looking at the result given by
of_get_phy_mode() and friends. From Dan Crapenter.
11) Disable preemption around BPF_PROG_RUN() calls, from Eric Dumazet.
12) Don't create VRF ipv6 rules if ipv6 is disabled, from David Ahern.
13) Fix quantization code in tcp_bbr, from Kevin Yang.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (127 commits)
net: tap: clean up an indentation issue
nfp: abm: fix memory leak in nfp_abm_u32_knode_replace
tcp: better handle TCP_USER_TIMEOUT in SYN_SENT state
sk_buff: drop all skb extensions on free and skb scrubbing
tcp_bbr: fix quantization code to not raise cwnd if not probing bandwidth
mlxsw: spectrum_flower: Fail in case user specifies multiple mirror actions
Documentation: Clarify trap's description
mlxsw: spectrum: Clear VLAN filters during port initialization
net: ena: clean up indentation issue
NFC: st95hf: clean up indentation issue
net: phy: micrel: add Asym Pause workaround for KSZ9021
net: socionext: ave: Avoid using netdev_err() before calling register_netdev()
ptp: correctly disable flags on old ioctls
lib: dimlib: fix help text typos
net: dsa: microchip: Always set regmap stride to 1
nfp: flower: fix memory leak in nfp_flower_spawn_vnic_reprs
nfp: flower: prevent memory leak in nfp_flower_spawn_phy_reprs
net/sched: Set default of CONFIG_NET_TC_SKB_EXT to N
vrf: Do not attempt to create IPv6 mcast rule if IPv6 is disabled
net: sched: sch_sfb: don't call qdisc_put() while holding tree lock
...
Merge hugepage allocation updates from David Rientjes:
"We (mostly Linus, Andrea, and myself) have been discussing offlist how
to implement a sane default allocation strategy for hugepages on NUMA
platforms.
With these reverts in place, the page allocator will happily allocate
a remote hugepage immediately rather than try to make a local hugepage
available. This incurs a substantial performance degradation when
memory compaction would have otherwise made a local hugepage
available.
This series reverts those reverts and attempts to propose a more sane
default allocation strategy specifically for hugepages. Andrea
acknowledges this is likely to fix the swap storms that he originally
reported that resulted in the patches that removed __GFP_THISNODE from
hugepage allocations.
The immediate goal is to return 5.3 to the behavior the kernel has
implemented over the past several years so that remote hugepages are
not immediately allocated when local hugepages could have been made
available because the increased access latency is untenable.
The next goal is to introduce a sane default allocation strategy for
hugepages allocations in general regardless of the configuration of
the system so that we prevent thrashing of local memory when
compaction is unlikely to succeed and can prefer remote hugepages over
remote native pages when the local node is low on memory."
Note on timing: this reverts the hugepage VM behavior changes that got
introduced fairly late in the 5.3 cycle, and that fixed a huge
performance regression for certain loads that had been around since
4.18.
Andrea had this note:
"The regression of 4.18 was that it was taking hours to start a VM
where 3.10 was only taking a few seconds, I reported all the details
on lkml when it was finally tracked down in August 2018.
https://lore.kernel.org/linux-mm/20180820032640.9896-2-aarcange@redhat.com/
__GFP_THISNODE in MADV_HUGEPAGE made the above enterprise vfio
workload degrade like in the "current upstream" above. And it still
would have been that bad as above until 5.3-rc5"
where the bad behavior ends up happening as you fill up a local node,
and without that change, you'd get into the nasty swap storm behavior
due to compaction working overtime to make room for more memory on the
nodes.
As a result 5.3 got the two performance fix reverts in rc5.
However, David Rientjes then noted that those performance fixes in turn
regressed performance for other loads - although not quite to the same
degree. He suggested reverting the reverts and instead replacing them
with two small changes to how hugepage allocations are done (patch
descriptions rephrased by me):
- "avoid expensive reclaim when compaction may not succeed": just admit
that the allocation failed when you're trying to allocate a huge-page
and compaction wasn't successful.
- "allow hugepage fallback to remote nodes when madvised": when that
node-local huge-page allocation failed, retry without forcing the
local node.
but by then I judged it too late to replace the fixes for a 5.3 release.
So 5.3 was released with behavior that harked back to the pre-4.18 logic.
But now we're in the merge window for 5.4, and we can see if this
alternate model fixes not just the horrendous swap storm behavior, but
also restores the performance regression that the late reverts caused.
Fingers crossed.
* emailed patches from David Rientjes <rientjes@google.com>:
mm, page_alloc: allow hugepage fallback to remote nodes when madvised
mm, page_alloc: avoid expensive reclaim when compaction may not succeed
Revert "Revert "Revert "mm, thp: consolidate THP gfp handling into alloc_hugepage_direct_gfpmask""
Revert "Revert "mm, thp: restore node-local hugepage allocations""
The "same probe" selftest that tests that adding the same probe fails
doesn't add the same probe and passes, which fails the test.
Fixes: b78b94b821 ("selftests/ftrace: Update kprobe event error testcase")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
In predicate_parse, there is an error path that is not going to
out_free instead it returns directly which leads to a memory leak.
Link: http://lkml.kernel.org/r/20190920225800.3870-1-navid.emamdoost@gmail.com
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
After r372664 in clang, the IF_ASSIGN macro causes a couple hundred
warnings along the lines of:
kernel/trace/trace_output.c:1331:2: warning: converting the enum
constant to a boolean [-Wint-in-bool-context]
kernel/trace/trace.h:409:3: note: expanded from macro
'trace_assign_type'
IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry,
^
kernel/trace/trace.h:371:14: note: expanded from macro 'IF_ASSIGN'
WARN_ON(id && (entry)->type != id); \
^
264 warnings generated.
This warning can catch issues with constructs like:
if (state == A || B)
where the developer really meant:
if (state == A || state == B)
This is currently the only occurrence of the warning in the kernel
tree across defconfig, allyesconfig, allmodconfig for arm32, arm64,
and x86_64. Add the implicit '!= 0' to the WARN_ON statement to fix
the warnings and find potential issues in the future.
Link: 28b38c277a
Link: https://github.com/ClangBuiltLinux/linux/issues/686
Link: http://lkml.kernel.org/r/20190926162258.466321-1-natechancellor@gmail.com
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Steven reported that a test triggered:
==================================================================
BUG: KASAN: slab-out-of-bounds in trace_kprobe_create+0xa9e/0xe40
Read of size 8 at addr ffff8880c4f25a48 by task ftracetest/4798
CPU: 2 PID: 4798 Comm: ftracetest Not tainted 5.3.0-rc6-test+ #30
Hardware name: Hewlett-Packard HP Compaq Pro 6300 SFF/339A, BIOS K01 v03.03 07/14/2016
Call Trace:
dump_stack+0x7c/0xc0
? trace_kprobe_create+0xa9e/0xe40
print_address_description+0x6c/0x332
? trace_kprobe_create+0xa9e/0xe40
? trace_kprobe_create+0xa9e/0xe40
__kasan_report.cold.6+0x1a/0x3b
? trace_kprobe_create+0xa9e/0xe40
kasan_report+0xe/0x12
trace_kprobe_create+0xa9e/0xe40
? print_kprobe_event+0x280/0x280
? match_held_lock+0x1b/0x240
? find_held_lock+0xac/0xd0
? fs_reclaim_release.part.112+0x5/0x20
? lock_downgrade+0x350/0x350
? kasan_unpoison_shadow+0x30/0x40
? __kasan_kmalloc.constprop.6+0xc1/0xd0
? trace_kprobe_create+0xe40/0xe40
? trace_kprobe_create+0xe40/0xe40
create_or_delete_trace_kprobe+0x2e/0x60
trace_run_command+0xc3/0xe0
? trace_panic_handler+0x20/0x20
? kasan_unpoison_shadow+0x30/0x40
trace_parse_run_command+0xdc/0x163
vfs_write+0xe1/0x240
ksys_write+0xba/0x150
? __ia32_sys_read+0x50/0x50
? tracer_hardirqs_on+0x61/0x180
? trace_hardirqs_off_caller+0x43/0x110
? mark_held_locks+0x29/0xa0
? do_syscall_64+0x14/0x260
do_syscall_64+0x68/0x260
Fix to check the difference of nr_args before adding probe
on existing probes. This also may set the error log index
bigger than the number of command parameters. In that case
it sets the error position is next to the last parameter.
Link: http://lkml.kernel.org/r/156966474783.3478.13217501608215769150.stgit@devnote2
Fixes: ca89bc071d ("tracing/kprobe: Add multi-probe per event support")
Reported-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
For systems configured to always try hard to allocate transparent
hugepages (thp defrag setting of "always") or for memory that has been
explicitly madvised to MADV_HUGEPAGE, it is often better to fallback to
remote memory to allocate the hugepage if the local allocation fails
first.
The point is to allow the initial call to __alloc_pages_node() to attempt
to defragment local memory to make a hugepage available, if possible,
rather than immediately fallback to remote memory. Local hugepages will
always have a better access latency than remote (huge)pages, so an attempt
to make a hugepage available locally is always preferred.
If memory compaction cannot be successful locally, however, it is likely
better to fallback to remote memory. This could take on two forms: either
allow immediate fallback to remote memory or do per-zone watermark checks.
It would be possible to fallback only when per-zone watermarks fail for
order-0 memory, since that would require local reclaim for all subsequent
faults so remote huge allocation is likely better than thrashing the local
zone for large workloads.
In this case, it is assumed that because the system is configured to try
hard to allocate hugepages or the vma is advised to explicitly want to try
hard for hugepages that remote allocation is better when local allocation
and memory compaction have both failed.
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Benoit Parrot