linux-toradex.git/drivers/input/misc/uinput.c, branch v4.20-rc3

Input: uinput - add a schedule point in uinput_inject_events()

2018-10-05T18:42:32+00:00

Large writes to uinput interface may cause rcu stalls. Let's add
cond_resched() to the loop to avoid this.

Reviewed-by: Paul E. McKenney 
Signed-off-by: Dmitry Torokhov

Input: uinput - allow for max == min during input_absinfo validation

2018-09-18T22:28:07+00:00

These values are inclusive, so a range of 1 requires min == max.

Signed-off-by: Peter Hutterer 
Reviewed-by: Martin Kepplinger 
Signed-off-by: Dmitry Torokhov

vfs: do bulk POLL* -> EPOLL* replacement

2018-02-11T22:34:03+00:00

This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:

    for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
        L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
        for f in $L; do sed -i "-es/^\([^\"]*\)\(\\)/\\1E\\2/" $f; done
    done

with de-mangling cleanups yet to come.

NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do.  But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.

The next patch from Al will sort out the final differences, and we
should be all done.

Scripted-by: Al Viro 
Signed-off-by: Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

2018-02-01T18:49:58+00:00

Pull input layer updates from Dmitry Torokhov:

 - evdev interface has been adjusted to extend the life of timestamps on
   32 bit systems to the year of 2108

 - Synaptics RMI4 driver's PS/2 guest handling ha beed updated to
   improve chances of detecting trackpoints on the pass-through port

 - mms114 touchcsreen controller driver has been updated to support
   generic device properties and work with mms152 cntrollers

 - Goodix driver now supports generic touchscreen properties

 - couple of drivers for AVR32 architecture are gone as the architecture
   support has been removed from the kernel

 - gpio-tilt driver has been removed as there are no mainline users and
   the driver itself is using legacy APIs and relies on platform data

 - MODULE_LINECSE/MODULE_VERSION cleanups

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (45 commits)
  Input: goodix - use generic touchscreen_properties
  Input: mms114 - fix typo in definition
  Input: mms114 - use BIT() macro instead of explicit shifting
  Input: mms114 - replace mdelay with msleep
  Input: mms114 - add support for mms152
  Input: mms114 - drop platform data and use generic APIs
  Input: mms114 - mark as direct input device
  Input: mms114 - do not clobber interrupt trigger
  Input: edt-ft5x06 - fix error handling for factory mode on non-M06
  Input: stmfts - set IRQ_NOAUTOEN to the irq flag
  Input: auo-pixcir-ts - delete an unnecessary return statement
  Input: auo-pixcir-ts - remove custom log for a failed memory allocation
  Input: da9052_tsi - remove unused mutex
  Input: docs - use PROPERTY_ENTRY_U32() directly
  Input: synaptics-rmi4 - log when we create a guest serio port
  Input: synaptics-rmi4 - unmask F03 interrupts when port is opened
  Input: synaptics-rmi4 - do not delete interrupt memory too early
  Input: ad7877 - use managed resource allocations
  Input: stmfts,s6sy671 - add SPDX identifier
  Input: remove atmel-wm97xx touchscreen driver
  ...

Input: remove unneeded MODULE_VERSION() usage in misc input drivers

2018-01-17T00:48:24+00:00

MODULE_VERSION is useless for in-kernel drivers, so just remove all
usage of it in the misc input drivers.  Along with this, some
DRIVER_VERSION macros were removed as they are also pointless.

Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Dmitry Torokhov

Input: extend usable life of event timestamps to 2106 on 32 bit systems

2018-01-10T00:40:30+00:00

The input events use struct timeval to store event time, unfortunately
this structure is not y2038 safe and is being replaced in kernel with
y2038 safe structures.

Because of ABI concerns we can not change the size or the layout of
structure input_event, so we opt to re-interpreting the 'seconds' part
of timestamp as an unsigned value, effectively doubling the range of
values, to year 2106.

Newer glibc that has support for 32 bit applications to use 64 bit
time_t supplies __USE_TIME_BITS64 define [1], that we can use to present
the userspace with updated input_event layout. The updated layout will
cause the compile time breakage, alerting applications and distributions
maintainers to the issue. Existing 32 binaries will continue working
without any changes until 2038.

Ultimately userspace applications should switch to using monotonic or
boot time clocks, as realtime clock is not very well suited for input
event timestamps as it can go backwards (see a80b83b7b8 "Input: evdev -
add CLOCK_BOOTTIME support" by by John Stultz). With monotonic clock the
practical range of reported times will always fit into the pair of 32
bit values, as we do not expect any system to stay up for a hundred
years without a single reboot.

[1] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign

Suggested-by: Arnd Bergmann 
Signed-off-by: Deepa Dinamani 
Acked-by: Peter Hutterer 
Patchwork-Id: 10148083
Signed-off-by: Dmitry Torokhov

Input: uinput - use monotonic times for timestamps

2018-01-02T06:54:42+00:00

struct timeval which is part of struct input_event to maintain the event
times is not y2038 safe.

Real time timestamps are also not ideal for input_event as this time can go
backwards as noted in the patch a80b83b7b8 by John Stultz.

The patch switches the timestamps to use monotonic time from realtime time.
This is assuming no one is using absolute times from these timestamps.

The structure to maintain input events will be changed in a different
patch.

Signed-off-by: Deepa Dinamani 
Acked-by: Peter Hutterer 
Patchwork-Id: 10118255
Signed-off-by: Dmitry Torokhov

the rest of drivers/*: annotate ->poll() instances

2017-11-28T16:06:58+00:00

Signed-off-by: Al Viro

Input: uinput - unlock on allocation failure in ioctl

2017-11-10T18:29:53+00:00

We have to unlock before returning if input_allocate_device() fails.

Fixes: 04ce40a61a91 ("Input: uinput - remove uinput_allocate_device()")
Signed-off-by: Dan Carpenter 
Signed-off-by: Dmitry Torokhov

Input: uinput - fold header into the driver proper

2017-10-23T23:32:31+00:00

There is nothing in the uinput kernel header that is of use to anyone in
the kernel besides the uinput driver itself, so let's fold it into the
driver code (leaving uapi part intact).

Signed-off-by: Dmitry Torokhov