| Age | Commit message (Collapse) | Author |
|---|
|
A reader sleeping in PPS_GEN_FETCHEVENT waits for the next event, but
no event comes after pps_gen_unregister_source(), so the reader sleeps
until it gets a signal. A PPS_GEN_FETCHEVENT issued after the
unregister sleeps the same way.
Wake up the readers on unregister, and make PPS_GEN_FETCHEVENT fail
with -ENODEV once the generator is gone, like the other ioctls. The
wait checks info without info_lock, so clear it with WRITE_ONCE().
Fixes: 86b525bed275 ("drivers pps: add PPS generators support")
Suggested-by: Rodolfo Giometti <giometti@enneenne.com>
Assisted-by: LLM
Signed-off-by: Danish Khateeb <danishkhateeb03@gmail.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://patch.msgid.link/20260929124937.51114-5-danishkhateeb03@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Both generator drivers stop their timer and then call
pps_gen_unregister_source(): pps_gen_tio_remove() cancels its hrtimer
and disables the TIO, and pps_gen_dummy_exit() deletes its timer. But
/dev/pps-genN and the sysfs "enable" attribute are still there until
the unregister, and a PPS_GEN_SETENABLE or a write to "enable" in
between starts the timer again. Nothing stops it after that: TIO's
hrtimer keeps running in the devm memory freed by the unbind, and the
dummy's timer is left in the unloaded module.
The drivers can't avoid this by unregistering first, as TIO's timer
callback uses pps_gen, which the unregister may free.
Stop the generator in pps_gen_unregister_cdev() instead, under
info_lock after the device and its sysfs files are gone, when nothing
can enable it again. pps_gen_unregister_source() then also does what
its kernel-doc says: "it disables the generator so no pulses are
generated anymore".
Fixes: 86b525bed275 ("drivers pps: add PPS generators support")
Cc: stable@vger.kernel.org
Suggested-by: Rodolfo Giometti <giometti@enneenne.com>
Assisted-by: LLM
Signed-off-by: Danish Khateeb <danishkhateeb03@gmail.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://patch.msgid.link/20260929124937.51114-4-danishkhateeb03@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
A file that was opened before pps_gen_unregister_source() keeps
pps_gen, and with it the pointer to the driver's pps_gen_source_info.
PPS_GEN_SETENABLE and PPS_GEN_USESYSTEMCLOCK keep using that pointer
after the driver has gone:
- pps_gen_tio allocates its info with devm_kzalloc(), so after an
unbind both ioctls read freed memory, and SETENABLE calls the
driver's enable() with its freed private data.
- pps_gen-dummy does not set info->owner, so it can be unloaded while
the file is open, and the ioctls then read the unloaded module's
data and call its code.
TIO can't probe in a VM, as it needs ART. A test driver that registers
its info in devm memory like TIO does, unbound while /dev/pps-gen0 is
open, gives:
BUG: KASAN: slab-use-after-free in pps_gen_cdev_ioctl+0x4c1/0x580
Read of size 1 at addr ffff88800e647f38 by task ppsgen64/145
...
Freed by task 146:
kfree+0x25a/0x6d0
release_nodes+0xd1/0x140
devres_release_all+0x10e/0x1a0
device_unbind_cleanup+0x71/0x250
device_release_driver_internal+0x41b/0x570
unbind_store+0xd9/0x100
and unloading pps_gen-dummy while its file is open oopses:
BUG: unable to handle page fault for address: ffffffffa0203040
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
RIP: 0010:pps_gen_cdev_ioctl+0x372/0x580
Protect info in the ioctl handler with a mutex, and clear it under the
mutex on unregister, so that unregister waits for the ioctls using it
and later ones fail with -ENODEV. PPS_KC_BIND does the same for a
removed PPS device since commit 3649f9a6b897 ("pps: don't allow
PPS_KC_BIND on removed devices"). The sysfs attributes need nothing
new: they are removed, and their callbacks drained, before info is
cleared.
Fixes: 86b525bed275 ("drivers pps: add PPS generators support")
Cc: stable@vger.kernel.org
Assisted-by: LLM
Signed-off-by: Danish Khateeb <danishkhateeb03@gmail.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://patch.msgid.link/20260929124937.51114-3-danishkhateeb03@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The cdev of a PPS generator is embedded in struct pps_gen_device, but
nothing ties the lifetime of that structure to the cdev: pps_gen is
freed by the release function of its device, and an open file holds a
device reference only until pps_gen_cdev_release() drops it.
When the generator is unregistered while /dev/pps-genN is open, that
put_device() drops the last reference and frees pps_gen, and __fput()
then calls cdev_put() on the freed cdev:
BUG: KASAN: slab-use-after-free in cdev_put+0x53/0x60
Read of size 8 at addr ffff88801383e138 by task ppsgen64/149
Call Trace:
cdev_put+0x53/0x60
__fput+0x745/0xad0
fput_close_sync+0xd9/0x1b0
__x64_sys_close+0x86/0xf0
...
Freed by task 149:
kfree+0x25a/0x6d0
device_release+0xca/0x3c0
kobject_put+0x169/0x320
pps_gen_cdev_release+0x51/0x80
__fput+0x36a/0xad0
pps.c had the same bug, fixed in commit c79a39dc8d06 ("pps: Fix a
use-after-free").
Fix it the usual way: embed the struct device in pps_gen_device and
register both with cdev_device_add(). This makes the device the parent
of the cdev, so the cdev holds a device reference until the last file
is closed.
Fixes: 86b525bed275 ("drivers pps: add PPS generators support")
Cc: stable@vger.kernel.org
Assisted-by: LLM
Signed-off-by: Danish Khateeb <danishkhateeb03@gmail.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://patch.msgid.link/20260929124937.51114-2-danishkhateeb03@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
files)
Replace the #include of <linux/mod_devicetable.h> by the more specific
<linux/device-id/*.h> where applicable. For most cases the include
can be dropped completely, only a few drivers need one or two headers
added.
Acked-by: Danilo Krummrich <dakr@kernel.org>
Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
|
|
There is no reason to use the more complex ktime_get_snapshot() for
retrieving CLOCK_REALTIME.
Just use ktime_get_real_ts64(), which avoids the extra timespec64
conversion as a bonus.
No functional change intended.
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Arthur Kiyanovski <akiyano@amazon.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://patch.msgid.link/20260529195557.074439049@kernel.org
|
|
The class_create() call has been deprecated in favor of class_register()
as the driver core now allows for a struct class to be in read-only
memory. Change pps_gen_class to be a const struct class and drop the
class_create() call.
Signed-off-by: Jori Koolstra <jkoolstra@xs4all.nl>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://patch.msgid.link/20260302142436.3292766-1-jkoolstra@xs4all.nl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:
Single allocations: kmalloc(sizeof(TYPE), ...)
are replaced with: kmalloc_obj(TYPE, ...)
Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with: kmalloc_objs(TYPE, COUNT, ...)
Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...)
(where TYPE may also be *VAR)
The resulting allocations no longer return "void *", instead returning
"TYPE *".
Signed-off-by: Kees Cook <kees@kernel.org>
|
|
This driver was introduced in January 2011 and has been marked
BROKEN for almost its entire existence, since commit 95b90afec301
("pps: make pps_gen_parport depend on BROKEN") in March 2011.
It is unlikely anyone will fix the driver at this point.
Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://patch.msgid.link/20260123035607.22340-1-enelsonmoore@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Use %ptSp instead of open coded variants to print content of
struct timespec64 in human readable format.
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20251113150217.3030010-17-andriy.shevchenko@linux.intel.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
|
|
platform_set_drvdata() is setting a double pointer to struct pps_tio as
driver_data, which will point to the local stack of probe function instead
of intended data. Set driver_data correctly and fix illegal memory access
by its user.
BUG: unable to handle page fault for address: ffffc9000117b738
RIP: 0010:hrtimer_active+0x2b/0x60
Call Trace:
? hrtimer_active+0x2b/0x60
hrtimer_cancel+0x19/0x50
pps_gen_tio_remove+0x1e/0x80 [pps_gen_tio]
Fixes: c89755d1111f ("pps: generators: Add PPS Generator TIO Driver")
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20250318114038.2058677-1-raag.jadav@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
hrtimer_setup() takes the callback function pointer as argument and
initializes the timer completely.
Replace hrtimer_init() and the open coded initialization of
hrtimer::function with the new setup mechanism.
Coccinelle scripted cleanup.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
timer_delete[_sync]() replaces del_timer[_sync](). Convert the whole tree
over and remove the historical wrapper inlines.
Conversion was done with coccinelle plus manual fixups where necessary.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char / misc / IIO driver updates from Greg KH:
"Here is the big set of char, misc, iio, and other smaller driver
subsystems for 6.15-rc1. Lots of stuff in here, including:
- loads of IIO changes and driver updates
- counter driver updates
- w1 driver updates
- faux conversions for some drivers that were abusing the platform
bus interface
- coresight driver updates
- rust miscdevice binding updates based on real-world-use
- other minor driver updates
All of these have been in linux-next with no reported issues for quite
a while"
* tag 'char-misc-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (292 commits)
samples: rust_misc_device: fix markup in top-level docs
Coresight: Fix a NULL vs IS_ERR() bug in probe
misc: lis3lv02d: convert to use faux_device
tlclk: convert to use faux_device
regulator: dummy: convert to use the faux device interface
bus: mhi: host: Fix race between unprepare and queue_buf
coresight: configfs: Constify struct config_item_type
doc: iio: ad7380: describe offload support
iio: ad7380: add support for SPI offload
iio: light: Add check for array bounds in veml6075_read_int_time_ms
iio: adc: ti-ads7924 Drop unnecessary function parameters
staging: iio: ad9834: Use devm_regulator_get_enable()
staging: iio: ad9832: Use devm_regulator_get_enable()
iio: gyro: bmg160_spi: add of_match_table
dt-bindings: iio: adc: Add i.MX94 and i.MX95 support
iio: adc: ad7768-1: remove unnecessary locking
Documentation: ABI: add wideband filter type to sysfs-bus-iio
iio: adc: ad7768-1: set MOSI idle state to prevent accidental reset
iio: adc: ad7768-1: Fix conversion result sign
iio: adc: ad7124: Benefit of dev = indio_dev->dev.parent in ad7124_parse_channel_config()
...
|
|
The Intel Timed IO PPS generator driver outputs a PPS signal using
dedicated hardware that is more accurate than software actuated PPS.
The Timed IO hardware generates output events using the ART timer.
The ART timer period varies based on platform type, but is less than 100
nanoseconds for all current platforms. Timed IO output accuracy is
within 1 ART period.
PPS output is enabled by writing '1' the 'enable' sysfs attribute. The
driver uses hrtimers to schedule a wake-up 10 ms before each event
(edge) target time. At wakeup, the driver converts the target time in
terms of CLOCK_REALTIME to ART trigger time and writes this to the Timed
IO hardware. The Timed IO hardware generates an event precisely at the
requested system time without software involvement.
Co-developed-by: Christopher Hall <christopher.s.hall@intel.com>
Signed-off-by: Christopher Hall <christopher.s.hall@intel.com>
Co-developed-by: Pandith N <pandith.n@intel.com>
Signed-off-by: Pandith N <pandith.n@intel.com>
Co-developed-by: Thejesh Reddy T R <thejesh.reddy.t.r@intel.com>
Signed-off-by: Thejesh Reddy T R <thejesh.reddy.t.r@intel.com>
Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
Reviewed-by: Eddie Dong <eddie.dong@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Subramanian Mohan <subramanian.mohan@intel.com>
Link: https://lore.kernel.org/r/20250219040618.70962-3-subramanian.mohan@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Some PPS generator drivers may need to retrieve a pointer to their
internal data while executing the PPS generator enable() method.
During the driver registration the pps_gen_device pointer is returned
from the framework, and for that reason, there is difficulty in
getting generator driver data back in the enable function. We won't be
able to use container_of macro as it results in static assert, and we
might end up in using static pointer.
To solve the issue and to get back the generator driver data back, we
should not copy the struct pps_gen_source_info within the struct
pps_gen_device during the registration stage, but simply save the
pointer of the driver one. In this manner, driver may get a pointer
to their internal data as shown below:
struct pps_gen_foo_data_s {
...
struct pps_gen_source_info gen_info;
struct pps_gen_device *pps_gen;
...
};
static int __init pps_gen_foo_init(void)
{
struct pps_gen_foo_data_s *foo;
...
foo->pps_gen = pps_gen_register_source(&foo->gen_info);
...
}
Then, in the enable() method, we can retrieve the pointer to the main
struct by using the code below:
static int pps_gen_foo_enable(struct pps_gen_device *pps_gen, bool enable)
{
struct pps_gen_foo_data_s *foo = container_of(pps_gen->info,
struct pps_gen_foo_data_s, gen_info);
...
}
Signed-off-by: Rodolfo Giometti <giometti@enneenne.com>
Tested-by: Subramanian Mohan <subramanian.mohan@intel.com>
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Subramanian Mohan <subramanian.mohan@intel.com>
Link: https://lore.kernel.org/r/20250219040618.70962-2-subramanian.mohan@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
hrtimer_setup() takes the callback function pointer as argument and
initializes the timer completely.
Replace hrtimer_init() and the open coded initialization of
hrtimer::function with the new setup mechanism.
Patch was created by using Coccinelle.
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://lore.kernel.org/all/4bf3bb22e21f27c58bb28690d856df913431e693.1738746904.git.namcao@linutronix.de
|
|
This dummy PPS generator can be used for debugging and documentation
purposes.
Signed-off-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://lore.kernel.org/r/20241108073115.759039-3-giometti@enneenne.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Sometimes one needs to be able not only to catch PPS signals but to
produce them also. For example, running a distributed simulation,
which requires computers' clock to be synchronized very tightly.
This patch adds PPS generators class in order to have a well-defined
interface for these devices.
Signed-off-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://lore.kernel.org/r/20241108073115.759039-2-giometti@enneenne.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
'devmodel' hasn't actually been used since:
'commit 3275158fa52a ("parport: remove use of devmodel")'
and everyone now has it set to true and has been fixed up; remove
the flag.
(There are still comments all over about it)
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Acked-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Link: https://lore.kernel.org/r/20240502154823.67235-4-linux@treblig.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Commit f77bf01425b1 ("kbuild: introduce ccflags-y, asflags-y and
ldflags-y") deprecates use of EXTRA_CFLAGS in the kernel build.
This has been cleaned up in the whole kernel tree long ago, but this one
single place must have been missed.
Replace the EXTRA_CFLAGS use by the common pattern for such debug flags.
No functional change.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://lore.kernel.org/r/20240306120515.15711-1-lukas.bulwahn@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Switch to use module_parport_driver() to reduce boilerplate code.
Note, it doesn't matter when we check the module parameter. If it was
writable we even would have more flexibility of changing it at runtime
(when built-in the kernel) after this patch.
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220210134943.62026-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not write to the free software foundation inc
675 mass ave cambridge ma 02139 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 441 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Modify pps generator driver to use the new parallel port device model.
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
getnstimeofday() is deprecated, so I'm converting this to use
ktime_get_real_ts64() as a safe replacement. I considered using
ktime_get_real() instead, but since the algorithm here depends on the
exact timing, I decided to introduce fewer changes and leave the code
that determines the nanoseconds since the last seconds wrap untouched.
It's not entirely clear to me whether we should also change the time
base to CLOCK_BOOTTIME or CLOCK_TAI. With boottime, we would be
independent of changes due to settimeofday() and only see the speed
adjustment from the upstream clock source, with the downside of having
the signal be at an arbirary offset from the start of the UTC second
signal. With CLOCK_TAI, we would use the same offset from the UTC
second as before and still suffer from settimeofday() adjustments, but
would be less confused during leap seconds.
Both boottime and tai only offer usable (i.e. avoiding ktime_t to
timespec64 conversion) interfaces for ktime_t though, so either way,
changing it wouldn't take significantly more work. CLOCK_MONOTONIC
could be used with ktime_get_ts64(), but would lose synchronization
across a suspend/resume cycle, which seems worse.
Link: http://lkml.kernel.org/r/20180116171451.3095620-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Adding high-level "if PPS" makes lower-level dependency tests superfluous.
Link: http://lkml.kernel.org/r/alpine.LFD.2.20.1708261050500.8156@localhost.localdomain
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
So that there's no need to get into the submenu to disable all related config
entries.
The BROKEN PPS_GENERATOR_PARPORT now also depends on PPS
Signed-off-by: Vincent Legoll <vincent.legoll@gmail.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Remove code enabled only when CONFIG_PREEMPT_RT is turned on because it is
not used in the vanilla kernel.
Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
This driver causes hard lockups, when the active clock soure is jiffies.
The reason is that it loops with interrupts disabled waiting for a
timestamp to be reached by polling getnstimeofday(). Though with a
jiffies clocksource, when that code runs on the same CPU which is
responsible for updating jiffies, then we loop in circles for ever
simply because the timer interrupt cannot update jiffies. So both UP
and SMP can be affected.
There is no easy fix for that problem so make it depend on BROKEN for
now.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: Rodolfo Giometti <giometti@linux.it>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Both pps_parport and pps_gen_parport are written in a way that they
can't share a port with any other driver. This can result in locking up
the process that loads modules or even the whole kernel if the modules
are compiled in. Use PARPORT_FLAG_EXCL to indicate this.
Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Add PPS signal generator which utilizes STROBE pin of a parallel port to
send PPS signals. It uses parport abstraction layer and hrtimers to
precisely control the signal.
Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Add PPS signal generator which utilizes STROBE pin of a parallel port to
send PPS signals. It uses parport abstraction layer and hrtimers to
precisely control the signal.
[akpm@linux-foundation.org: fix build]
Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
