The iio_triggered_buffer_postenable() hook should be called first to
attach the poll function. The iio_triggered_buffer_predisable() hook is
called last (as is it should).
This change moves iio_triggered_buffer_postenable() to be called first. It
adds iio_triggered_buffer_predisable() on the error paths of the postenable
hook.
For the predisable hook, some code-paths have been changed to make sure
that the iio_triggered_buffer_predisable() hook gets called in case there
is an error before it.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
At a slight footprint cost (24 vs 32 bytes), mutexes are more optimal
than semaphores; it's also a nicer interface for mutual exclusion,
which is why they are encouraged over binary semaphores, when possible.
For both v_sem and z_sem, their semantics imply traditional lock
ownership; that is, the lock owner is the same for both lock/unlock
operations. Therefore it is safe to convert.
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Link: https://lore.kernel.org/r/20191030144916.10802-1-dave@stgolabs.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Second set of IIO + counter new device support, features etc for the 5.5 cycle.
Note two merge commits in here, both for immutable branches based
of 5.4-rc1.
1. Ti eqep driver because of some file moves in precursor patches.
I suspect no one else will pull this one.
2. ab8500 refactor as changes in power supply, hwmon and mfd trees.
This may come via numerous trees as well as IIO.
Counter subsystem related
* ti eqep
- New device support with bindings.
- Includes prior file move to reflect more general use of ti-pwmss.
* Counter core
- simplify count_read and count_write callbacks + document change.
- fix a typo in docs.
Various subsystems related
* AB8500
- ab8500_btemp driver converted to be an IIO consumer driver.
- ab8500_charger driver converted to be an IIO consumer driver.
- ab8500_fg fuel gauge driver converted to be an IIO consumer driver.
- ab8500 hwmon driver converted to be an IIO consumer driver.
- mfd bindings augmented with the adc channels to make the above work.
- drop original mfd driver.
New device support
* ab8500
- new ADC driver used by the above other subystems via the IIO consumer
interface.
* adux1020 photometric sensor
- new driver and dt bindings.
* fxos877cq
- new driver for this simple(ish) IMU with DT bindings.
* intel_mrfld_adc
- new driver for the ADC found on Intel Merrifield platforms.
* ltc2983
- new driver for this multi-sensor type temperature interface.
Includes complex DT bindings.
* max1027
- support for 12 bit devices, max1227, max1229 and max1231 + add to trivial
bindings.
* st_lsm6dsx
- support for the LSM6DS0 6 axis MEMs sensor.
Note different from the LSM6DSO which the driver already supports *sigh*
- support for the LSM6DSRX 6 axis MEMs sensor.
Features and cleanups
* ad7303
- replace use of core mlock with a local lock with cleanly defined scope.
* ad9834
- add a check for devm_clk_get failing.
* at91-sama5d2
- tidy up a 0 as NULL warning.
* bmp280
- endian type tidy ups.
- use bulk regulator ops for a small reduction in code.
- use devm_add_action... to simplify error path handling.
* exynos
- drop stray semicolon.
- use devm_platform_ioremap_resource to reduce boilerplate.
* hx711
- various tricks to improve the frequency of read out possible.
* max1027
- debugfs support.
- make interrupts optional.
- reset at probe to get clean state.
- refactors to allow addition of new device support.
* maxim thermocouple
- drop an unneeded semicolon.
* mb1232
- yaml binding conversion.
* mcp320x
- tidy up an endian types in cast warning.
* meson_saradc
- use devm_platform_ioremap_resource to reduce boilerplate.
* mpu3050
- make a poison value explicity big endian to supress a warning.
* pulsedlight v2
- endian type tidy ups.
* sgp30
- drop an excess semicolon.
* sps30
- make truncation explicit with masking to clean up a warning.
* st sensors
- drop gpio include as none of these support gpios.
* st_lsm6dsx
- tidy up some alignment issues.
- refactors to allow addition of new device support.
* allow varients of irq related reg definitions.
* avoid accessing active-low, open-drain regs if not provided.
* allow varients of bdu/boot and reset regs.
* allow for enabling or disabling wakeup sources through platform
data (seems someone still uses this).
- enable wake-up events for LSM6DS0
- use the drdy mask to avoid some invalid samples during initial start
of sensor.
- Add support to trim the timestamp.
* stm32_adc
- kernel-doc fixes.
* stm32_dac
- power management support.
* stmpe-adc
- Fix endian type of local variable.
* twl4030
- use false / true instead of 0 / 1 for booleans.
* xilinx-xadc
- use devm_platform_ioremap_resouce to reduce boilerplate.
* zpa2326
- reorganise buffer handling setup to be more consistent.
Fixes (mostly recent additions)
* cpcap-adc
- Fix mising IRQF_ONESHOT that would cause warnings to be printed.
* st_lsm6dsx
- Sanity check the read_fifo pointer is set.
- use locked read and update functions to prevent some races.
- avoid accessing enable_reg if not provided.
- take a lock to prevent a race in updating the config.
- kernel-doc fixes.
- document wakeup-source property in dt binding.
- fix lsm9ds1 gyro gain definitions.
* tag 'iio-for-5.5b' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (73 commits)
dt-bindings: iio: imu: st_lsm6dsx: add lsm6dsrx device bindings
iio: imu: st_lsm6dsx: add support to LSM6DSRX
iio: st: Drop GPIO include
iio: adc: hx711: optimize performance in read cycle
iio: adc: stm32-adc: fix kernel-doc warnings
iio: pressure: zpa2326: fix iio_triggered_buffer_postenable position
iio: chemical: sgp30: drop excess semicolon
iio: adc: twl4030: Use false / true instead of 0 / 1 with booleans
dt-bindings: iio: Add ltc2983 documentation
iio: temperature: Add support for LTC2983
iio: pressure: bmp280: use devm action and remove labels from probe
iio: pressure: bmp280: use bulk regulator ops
iio: imu: Add support for the FXOS8700 IMU
dt-bindings: iio: imu: add fxos8700 imu binding
staging: iio: ad9834: add a check for devm_clk_get
iio: adc: xilinx-xadc: use devm_platform_ioremap_resource
iio: temp: maxim thermocouple: Drop unneeded semi colon.
iio: adc: cpcap-adc: Fix missing IRQF_ONESHOT as only threaded handler.
iio: adc: meson_saradc: use devm_platform_ioremap_resource
iio: adc: exynos: use devm_platform_ioremap_resource
...
None of the ST sensor drivers use any symbols from
<linux/gpio.h>, just drop the include from all of them.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Pull x86 fixes from Thomas Gleixner:
"Two fixes for the VMWare guest support:
- Unbreak VMWare platform detection which got wreckaged by converting
an integer constant to a string constant.
- Fix the clang build of the VMWAre hypercall by explicitely
specifying the ouput register for INL instead of using the short
form"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu/vmware: Fix platform detection VMWARE_PORT macro
x86/cpu/vmware: Use the full form of INL in VMWARE_HYPERCALL, for clang/llvm
Pull timer fixes from Thomas Gleixner:
"A small set of fixes for time(keeping):
- Add a missing include to prevent compiler warnings.
- Make the VDSO implementation of clock_getres() POSIX compliant
again. A recent change dropped the NULL pointer guard which is
required as NULL is a valid pointer value for this function.
- Fix two function documentation typos"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
posix-cpu-timers: Fix two trivial comments
timers/sched_clock: Include local timekeeping.h for missing declarations
lib/vdso: Make clock_getres() POSIX compliant again
Pull perf fixes from Thomas Gleixner:
"A set of perf fixes:
kernel:
- Unbreak the tracking of auxiliary buffer allocations which got
imbalanced causing recource limit failures.
- Fix the fallout of splitting of ToPA entries which missed to shift
the base entry PA correctly.
- Use the correct context to lookup the AUX event when unmapping the
associated AUX buffer so the event can be stopped and the buffer
reference dropped.
tools:
- Fix buildiid-cache mode setting in copyfile_mode_ns() when copying
/proc/kcore
- Fix freeing id arrays in the event list so the correct event is
closed.
- Sync sched.h anc kvm.h headers with the kernel sources.
- Link jvmti against tools/lib/ctype.o to have weak strlcpy().
- Fix multiple memory and file descriptor leaks, found by coverity in
perf annotate.
- Fix leaks in error handling paths in 'perf c2c', 'perf kmem', found
by a static analysis tool"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/aux: Fix AUX output stopping
perf/aux: Fix tracking of auxiliary trace buffer allocation
perf/x86/intel/pt: Fix base for single entry topa
perf kmem: Fix memory leak in compact_gfp_flags()
tools headers UAPI: Sync sched.h with the kernel
tools headers kvm: Sync kvm.h headers with the kernel sources
tools headers kvm: Sync kvm headers with the kernel sources
tools headers kvm: Sync kvm headers with the kernel sources
perf c2c: Fix memory leak in build_cl_output()
perf tools: Fix mode setting in copyfile_mode_ns()
perf annotate: Fix multiple memory and file descriptor leaks
perf tools: Fix resource leak of closedir() on the error paths
perf evlist: Fix fix for freed id arrays
perf jvmti: Link against tools/lib/ctype.h to have weak strlcpy()
Pull irq fixes from Thomas Gleixner:
"Two fixes for interrupt controller drivers:
- Skip IRQ_M_EXT entries in the device tree when initializing the
RISCV PLIC controller to avoid a double init attempt.
- Use the correct ITS list when issuing the VMOVP synchronization
command so the operation works only on the ITS instances which are
associated to a VM"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/sifive-plic: Skip contexts except supervisor in plic_init()
irqchip/gic-v3-its: Use the exact ITSList for VMOVP
Pull cifs fixes from Steve French:
"Seven cifs/smb3 fixes, including three for stable"
* tag '5.4-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: Fix cifsInodeInfo lock_sem deadlock when reconnect occurs
CIFS: Fix use after free of file info structures
CIFS: Fix retry mid list corruption on reconnects
cifs: Fix missed free operations
CIFS: avoid using MID 0xFFFF
cifs: clarify comment about timestamp granularity for old servers
cifs: Handle -EINPROGRESS only when noblockcnt is set
Pull RISC-V fixes from Paul Walmsley:
"Several minor fixes and cleanups for v5.4-rc5:
- Three build fixes for various SPARSEMEM-related kernel
configurations
- Two cleanup patches for the kernel bug and breakpoint trap handler
code"
* tag 'riscv/for-v5.4-rc5-b' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: cleanup do_trap_break
riscv: cleanup <asm/bug.h>
riscv: Fix undefined reference to vmemmap_populate_basepages
riscv: Fix implicit declaration of 'page_to_section'
riscv: fix fs/proc/kcore.c compilation with sparsemem enabled
Pull MIPS fixes from Paul Burton:
"A few MIPS fixes:
- Fix VDSO time-related function behavior for systems where we need
to fall back to syscalls, but were instead returning bogus results.
- A fix to TLB exception handlers for Cavium Octeon systems where
they would inadvertently clobber the $1/$at register.
- A build fix for bcm63xx configurations.
- Switch to using my @kernel.org email address"
* tag 'mips_fixes_5.4_3' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
MIPS: tlbex: Fix build_restore_pagemask KScratch restore
MIPS: bmips: mark exception vectors as char arrays
mips: vdso: Fix __arch_get_hw_counter()
MAINTAINERS: Use @kernel.org address for Paul Burton
Pull tty/serial driver fix from Greg KH:
"Here is a single tty/serial driver fix for 5.4-rc5 that resolves a
reported issue.
It has been in linux-next for a while with no problems"
* tag 'tty-5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
8250-men-mcb: fix error checking when get_num_ports returns -ENODEV
