- 08 Jan, 2018 40 commits
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NeilBrown authored
The cfs_get_random_bytes() interface adds nothing of value to get_random_byte() (which it uses internally). So just use the standard interface. Signed-off-by:
NeilBrown <neilb@suse.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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NeilBrown authored
The only places that cfs_srand is called, the random bits are mixed with bits from get_random_bytes(). So it is equally effective to add entropy to either pool. So we can replace calls to cfs_srand() with calls that add the entropy with add_device_randomness(). That function adds time-based entropy, so we can discard the ktime_get_ts64 calls. One location in lustre_handles.c only adds timebased entropy. This cannot improve the entropy provided by get_random_bytes(), so just discard that call. Signed-off-by:
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NeilBrown authored
All occurrences of cfs_rand() % X are replaced with prandom_u32_max(X) cfs_rand() is a simple Linear Congruential PRNG. prandom_u32_max() is at least as random, is seeded with more randomness, and uses cpu-local state to avoid cross-cpu issues. This is the first step is discarding the libcfs prng with the standard linux prng. Signed-off-by:
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NeilBrown authored
In every case, the value passed via wi_data can be determined from the cfs_workitem pointer using container_of(). So use container_of(), and discard wi_data. Signed-off-by:
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NeilBrown authored
lustre has a work-item queuing scheme that provides the same functionality as linux work_queues. To make the code easier for linux devs to follow, change to use work_queues. Signed-off-by:
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NeilBrown authored
lustre_fill_super() calls client_fill_super() without holding a reference to the module containing client_fill_super. If that module is unloaded at a bad time, this can crash. To be able to get a reference to the module using try_get_module(), we need a pointer to the module. So replace lustre_register_client_fill_super() and lustre_register_kill_super_cb() with a single lustre_register_super_ops() which also passed a module pointer. Then use a spinlock to ensure the module pointer isn't removed while try_module_get() is running, and use try_module_get() to ensure we have a reference before calling client_fill_super(). Signed-off-by:
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NeilBrown authored
This arg is always NULL and is never used. So discard it from this and related functions. Signed-off-by:
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NeilBrown authored
This is used to pass a void* and NULL to lustre_fill_super(). It is easier just to pass the void*. Signed-off-by:
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NeilBrown authored
Lustre mounts do not need a dev, as we can see from lustre_mount() calling mount_nodev(). So remove the flag which could cause confusion elsewhere. Also format lustre_fs_types so that fields line up. Signed-off-by:
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NeilBrown authored
Calling smp_processor_id() without disabling preemption triggers a warning (if CONFIG_DEBUG_PREEMPT). I think the result of cfs_cpt_current() is only used as a hint for load balancing, rather than as a precise and stable indicator of the current CPU. So it doesn't need to be called with preemption disabled. So disable preemption inside cfs_cpt_current() to silence the warning. Signed-off-by:
Andreas Dilger <andreas.dilger@intel.com> Signed-off-by:
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NeilBrown authored
Linux lib provides identical functionality to cfs_trimwhite, so discard that code and use the standard. Signed-off-by:
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Narcisa Ana Maria Vasile authored
in_concentration_raw should report, according to sysfs-bus-iio documentation, a "Raw (unscaled no offset etc.) percentage reading of a substance." Modify scale to convert from ppm/ppb to percentage: 1 ppm = 0.0001% 1 ppb = 0.0000001% There is no offset needed to convert the ppm/ppb to percentage, so remove offset from IIO_CONCENTRATION (IIO_MOD_CO2) channel. Cc'd stable to reduce chance of userspace breakage in the long run as we fix this wrong bit of ABI usage. Signed-off-by:
Narcisa Ana Maria Vasile <narcisaanamaria12@gmail.com> Cc: <Stable@vger.kernel.org> Reviewed-by:
Matt Ranostay <matt.ranostay@konsulko.com> Signed-off-by:
Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by:
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Venkat Prashanth B U authored
Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE for debugfs files. Semantic patch information: Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file() imposes some significant overhead as compared to DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe(). Generated by: scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci Signed-off-by:
Venkat Prashanth B U <venkat.prashanth2498@gmail.com> Signed-off-by:
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Venkat Prashanth B U authored
Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE for debugfs files. Semantic patch information: Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file() imposes some significant overhead as compared to DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe(). Generated by: scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci Signed-off-by:
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George Edward Bulmer authored
This fixes three instances of checkpatch warning: WARNING: line over 80 characters Signed-off-by:
George Edward Bulmer <gebulmer@googlemail.com> Signed-off-by:
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Lorenzo Bianconi authored
Remove st_lsm6dsx_write_with_mask() declaration since it has been removed in commit 6674bef628e6 ("iio: imu: st_lsm6dsx: add regmap API support") Signed-off-by:Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by:
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Lorenzo Bianconi authored
Allocate device read buffer at bootstrap and do not put it on the stack since it is pretty big (~200B) and its size will increase adding support to device hw timestamp. Moreover this patch fixes following sparse warnings: drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c:250:17: warning: Variable length array is used. drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c:283:55: error: cannot size expression Fixes: 290a6ce1 ("iio: imu: add support to lsm6dsx driver") Signed-off-by:
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Tobin C. Harding authored
Kernel-doc for @use_count does not currently have a field identifier. All the rest of the fields do. @use_count is used internally and should not be accessed directly by the driver so it should be marked as so. Add [INTERN] identifier to @use_count field. Signed-off-by:
Tobin C. Harding <me@tobin.cc> Signed-off-by:
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Tobin C. Harding authored
When building kernel documentation sphinx emits the following warning warning: No description found for parameter 'owner' Add description for struct member 'owner'. Signed-off-by:
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Sumit Pundir authored
This patch fixes the following checkpatch.pl issue at multiple lines: CHECK: Prefer using the BIT macro Signed-off-by:
Sumit Pundir <pundirsumit11@gmail.com> Signed-off-by:
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Fabrice Gasnier authored
By default, watermark is set to '1'. Watermark is used to fine tune cyclic dma buffer period. In case watermark is left untouched (e.g. 1) and several channels are being scanned, buffer period is wrongly set (e.g. to 1 sample). As a consequence, data is never pushed to upper layer. Fix buffer period size, by taking scan channels number into account. Fixes: 2763ea05 ("iio: adc: stm32: add optional dma support") Signed-off-by:
Fabrice Gasnier <fabrice.gasnier@st.com> Cc: <Stable@vger.kernel.org> Signed-off-by:
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Venkat Prashanth B U authored
This is the patch to the file ti_am335x_adc.c which fixes the following coccinelle warning: WARNING: Comparison to bool Signed-off-by:
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Aishwarya Pant authored
This is a clean-up patch which replaces DEVICE_ATTR() macro with the file permission specific DEVICE_ATTR_RW() macro for compaction and readability. Done using coccinelle. Signed-off-by:
Aishwarya Pant <aishpant@gmail.com> Signed-off-by:
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Julia Lawall authored
This driver creates a number of const structures that it stores in the data field of an of_device_id array. Add const to the declaration of the location that receives a value from the data field to ensure that the compiler will continue to check that the value is not modified and remove the const-dropping cast on the access to the data field. Done using Coccinelle. Signed-off-by:
Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by:
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Lorenzo Bianconi authored
Introduce regmap API support to access to i2c/spi bus instead of using a custom support. Set max bulk read to (32 / SAMPLE_SIZE) * SAMPLE_SIZE since spi_write_then_read() used in regmap_spi indicates that is the max buffer length to use in order to avoid a kmalloc for each bus access. Remove lock mutex since concurrency is already managed by regmap API Signed-off-by:
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Lorenzo Bianconi authored
Add conf_lock mutex to prevent concurrent FIFO configuration update Fixes: 290a6ce1 (iio: imu: add support to lsm6dsx driver) Signed-off-by:
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Lorenzo Bianconi authored
Apply le16_to_cpu() to data read from the sensor in order to take into account architecture endianness Fixes: 290a6ce1 (iio: imu: add support to lsm6dsx driver) Signed-off-by:
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Lorenzo Bianconi authored
Move duplicated i2c/spi probe code in hts221_probe() Signed-off-by:
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Stefan Tatschner authored
This patch affects BME280 and BMP280. The readout of the calibration data is moved to the probe function. Each sensor data access triggered reading the full calibration data before this patch. According to the datasheet, Section 4.4.2., the calibration data is stored in non-volatile memory. Since the calibration data does not change, and cannot be changed by the user, we can reduce bus traffic by reading the calibration data once. Additionally, proper organization of the data types enables removing some odd casts in the compensation formulas. Signed-off-by:
Stefan Tatschner <stefan.tatschner@gmail.com> Tested-by:
Andreas Klinger <ak@it-klinger.de> Signed-off-by:
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Stefan Brüns authored
Currently, the registers are read out once per conversion interval. If the reading is delayed as the conversion has not yet finished, this extra time is treated as being part of the readout, although it should delay the start of the poll interval. This results in the interval starting slightly earlier in each iteration, until all time between reads is spent polling the status registers instead of sleeping. To fix this, the delay has to account for the state of the conversion ready flag. Whenever the conversion is already finished, schedule the next read on the regular interval, otherwise schedule it one interval after the flag bit has been set. Split the work function in two functions, one for the status poll and one for reading the values, to be able to note down the time when the flag bit is raised. Signed-off-by:
Stefan Brüns <stefan.bruens@rwth-aachen.de> Signed-off-by:
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Stefan Brüns authored
As the timestamp is no longer (ab-)used to measure the function run time, it can be taken at the correct time, i.e. when the conversion has finished. Signed-off-by:
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Stefan Brüns authored
The iio timestamp clock is user selectable and may be non-monotonic. Also, only part of the acquisition time is measured, thus the delay was longer than intended. Use a monotonic timestamp to track the time for the next poll iteration. The timestamp is advanced by the sampling interval each iteration. In case the conversion overrruns the register readout (i.e. fast sampling combined with a slow bus), one or multiple samples will be dropped. Signed-off-by:
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Tobin C. Harding authored
When building kernel documentation sphinx emits the following warnings No description found for parameter 'iio_dev' Excess function parameter 'indio_dev' description in 'iio_device_register' These warnings are caused by a macro with a different argument identifier to the one listed in the kernel-docs. Change macro argument to be the same as the docs. Signed-off-by:
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Maciej Purski authored
Calibration register is used for calculating current register in hardware according to datasheet: current = shunt_volt * calib_register / 2048 (ina 226) current = shunt_volt * calib_register / 4096 (ina 219) Fix calib_register value to 2048 for ina226 and 4096 for ina 219 in order to avoid truncation error and provide best precision allowed by shunt_voltage measurement. Make current scale value follow changes of shunt_resistor from sysfs as calib_register value is now fixed. Power_lsb value should also follow shunt_resistor changes as stated in datasheet: power_lsb = 25 * current_lsb (ina 226) power_lsb = 20 * current_lsb (ina 219) This is a part of the patchset: https://lkml.org/lkml/2017/11/22/394Signed-off-by:
Maciej Purski <m.purski@samsung.com> Reviewed-by:
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Ji-Hun Kim authored
Clean up checkpatch warning: CHECK: Unnecessary parentheses around 'st->devid != ID_AD7195' Signed-off-by:
Ji-Hun Kim <jihuun.k@gmail.com> Signed-off-by:
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Venkat Prashanth B U authored
This is a patch to the at91_adc.c file that fixes up a brace warning found by the checkpatch.pl tool Signed-off-by:
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Andreas Klinger authored
Return value in hx711_reset() should indicate status of dout otherwise the calling function is reporting an error as false positive If there are two reads too close to each other, then the second one will never succeed. This happens especially when using buffered mode with both channels enabled. When changing the channel on every trigger event the former 100 ms are not enough for waiting until the device indicates normal mode. Wait up to 1 second until the device turns into normal mode. Signed-off-by:
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Andreas Klinger authored
Add buffer to device data struct and add trigger function Data format is quite simple: voltage - channel 0 32 Bit voltage - channel 1 32 Bit timestamp 64 Bit Using both channels at the same time is working quite slow because of changing the channel which needs a dummy read. Signed-off-by: -
Stefan Brüns authored
The conversion time can be up to 16 seconds (8 ms per channel, 2 channels, 1024 times averaging). Signed-off-by:
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Stefan Brüns authored
Although the datasheet states the CNVR flag is cleared by reading the BUS_VOLTAGE register, it is actually cleared by reading any of the voltage/current/power registers. The behaviour has been confirmed by TI support: http://e2e.ti.com/support/amplifiers/current-shunt-monitors/f/931/p/647053/2378282Signed-off-by:
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