- 01 Aug, 2018 2 commits
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Maxime Roussin-Bélanger authored
Read response register to detect any error. Signed-off-by:
Maxime Roussin-Bélanger <maxime.roussinbelanger@gmail.com> Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Jonathan Cameron authored
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- 30 Jul, 2018 1 commit
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Colin Ian King authored
The current check on val always results in true and so the call to sii1133_update_adcsens never gets called. Fix this check so it returns with -EINVAL only when val is not zero and not one. Detected by CoverityScan, CID#1472099 ("Logically dead code") Fixes: e01e7eaf ("iio: light: introduce si1133") Signed-off-by:Colin Ian King <colin.king@canonical.com> Signed-off-by:
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- 29 Jul, 2018 8 commits
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Manish Narani authored
Enabling the Interrupts before registering the irq handler is a bad idea. This patch corrects the same for XADC driver. Signed-off-by:
Manish Narani <manish.narani@xilinx.com> Signed-off-by:
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Manish Narani authored
This patch avoids getting irq number in xadc_remove function. Instead store 'irq' in xadc struct and use xadc->irq wherever needed. This patch also resolves a warning reported by coverity where it asks to check return value of platform_get_irq() for any errors in xadc_remove. Signed-off-by:
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Manish Narani authored
This patch limits the xadc pcap clock frequency value to be less than 200MHz. This fixes the issue when zynq is booted at higher frequency values, pcap crosses the maximum limit of 200MHz(Fmax) as it is derived from IOPLL. If this limit is crossed it is required to alter the WEDGE and REDGE bits of XADC_CFG register to make timings better in the interface. So to avoid alteration of these bits every time, the pcap value should not cross the Fmax limit. Signed-off-by:
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Manish Narani authored
This patch adds check for return values from clock related functions. This was reported by static code analysis tool. Signed-off-by:
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Tomas Novotny authored
VCNL4200 is an integrated long distance (up to 1500mm) proximity and ambient light sensor. The support is very basic. There is no configuration of proximity and ambient light sensing yet. Only the reading of both measured values is done. The reading of ambient light and proximity values is blocking. If you request a new value too early, the driver waits for new value to be ready. Signed-off-by:
Tomas Novotny <tomas@novotny.cz> Signed-off-by:
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Tomas Novotny authored
We can detect incorrectly specified device id for some chips, so warn user in that case. Signed-off-by:
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Tomas Novotny authored
The driver already supports VCNL4010/20 devices. The currently supported features and detectable product id are the same, so add shared id for them. This is a groundwork to extend the driver by detecting incorrectly specified device id. Signed-off-by:
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Tomas Novotny authored
There are similar chips in the vcnl4xxx family. The initialization and communication is a bit different for members of the family, so this patch makes the driver extendable for different chips. There is no functional change. Signed-off-by:
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- 28 Jul, 2018 10 commits
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Nicholas Mc Guire authored
wait_for_completion_timeout returns unsigned long not int so an appropriate variable is declared and the assignment and check fixed up. Signed-off-by:
Nicholas Mc Guire <hofrat@osadl.org> Reviewed-by:
Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by:
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Himanshu Jha authored
Bosch BME680 is a 4-in-1 sensor with temperature, pressure, humidity and gas sensing capability. It supports both I2C and SPI communication protocol for effective data communication. The device supports two modes: 1. Sleep mode 2. Forced mode The measurements only takes place when forced mode is triggered and a single TPHG cycle is performed by the sensor. The sensor automatically goes to sleep after afterwards. The device has various calibration constants/parameters programmed into devices' non-volatile memory(NVM) during production and can't be altered by the user. These constants are used in the compensation functions to get the required compensated readings along with the raw data. The compensation functions/algorithms are provided by Bosch Sensortec GmbH via their API[1]. As these don't change during the measurement cycle, therefore we read and store them at the probe. The default configs supplied by Bosch are also set at probe. 0-day tested with build success. GSoC-2018: https://summerofcode.withgoogle.com/projects/#6691473790074880 Mentor: Daniel Baluta [1] https://github.com/BoschSensortec/BME680_driver Datasheet: https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME680-DS001-00.pdf Note from Jonathan: The compensation functions are 'interesting' and could do with a tidy up in future. However, they work so we can leave that for another day. Cc: Daniel Baluta <daniel.baluta@nxp.com> Signed-off-by:
Himanshu Jha <himanshujha199640@gmail.com> Signed-off-by:
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Michael Hennerich authored
The AD9523 supports external signals for power-down mode, resetting the device and sync timing. This change add support for specifying values for these signals via the gpios and initializing them default values. For the reset signal, the GPIO is toggled during probing to re-initialize the device to a known state. Signed-off-by:
Michael Hennerich <michael.hennerich@analog.com> Signed-off-by:
Lars-Peter Clausen <lars@metafoo.de> Signed-off-by:
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Lars-Peter Clausen authored
A sysfs write callback function needs to either return the number of consumed characters or an error. The ad952x_store() function currently returns 0 if the input value was "0", this will signal that no characters have been consumed and the function will be called repeatedly in a loop indefinitely. Fix this by returning number of supplied characters to indicate that the whole input string has been consumed. Signed-off-by:
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Wei Yongjun authored
In case of error, the function device_create() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Fixes: 4a965c5f ("staging: add driver for Xilinx AXI-Stream FIFO v4.1 IP core") Signed-off-by:
Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Todd Poynor authored
Remove code with TODOs on it for working around apparent problems previously seen in a qemu environment where dma_ops was not set correctly. There is no user of this in the current code. Signed-off-by:
Todd Poynor <toddpoynor@google.com> Signed-off-by:
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Todd Poynor authored
The device pointer passed into get_mapping() will never be NULL; the check is unnecessary. Reported-by:
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Todd Poynor authored
Apex chips with class 0 (PCI_CLASS_NOT_DEFINED) fixed up to PCI_CLASS_SYSTEM_OTHER to enable PCI resource assignments. Signed-off-by:
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Todd Poynor authored
Remove the check for refcount already zero, which shouldn't be necessary. Signed-off-by:
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Gao Xiang authored
There is a type mismatch in the definition of Z_EROFS_VLE_VMAP_ONSTACK_PAGES, let's fix it. Link: https://lists.01.org/pipermail/kbuild-all/2018-July/050707.htmlReported-by:
kbuild test robot <lkp@intel.com> Signed-off-by:
Gao Xiang <gaoxiang25@huawei.com> Signed-off-by:
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- 27 Jul, 2018 19 commits
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Gao Xiang authored
This patch adds a TODO to list the things to be done, and the relevant info to MAINTAINERS so we can take all the blame :) Signed-off-by:
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Gao Xiang authored
This patch adds an optional choice which can be enabled by users in order to cache both incomplete ends of compressed clusters as a complement to the in-place decompression in order to boost random read, but it costs more memory than the in-place decompression only. Signed-off-by:
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Gao Xiang authored
This patch introduces the basic in-place VLE decompression implementation for the erofs file system. Compared with fixed-sized input compression, it implements what we call 'the variable-length extent compression' which specifies the same output size for each compression block to make the full use of IO bandwidth (which means almost all data from block device can be directly used for decomp- ression), improve the real (rather than just via data caching, which costs more memory) random read and keep the relatively lower compression ratios (it saves more storage space than fixed-sized input compression which is also configured with the same input block size), as illustrated below: |--- variable-length extent ---|------ VLE ------|--- VLE ---| /> clusterofs /> clusterofs /> clusterofs /> clusterofs ++---|-------++-----------++---------|-++-----------++-|---------++-| ...|| | || || | || || | || | ... original data ++---|-------++-----------++---------|-++-----------++-|---------++-| ++->cluster<-++->cluster<-++->cluster<-++->cluster<-++->cluster<-++ size size size size size \ / / / \ / / / \ / / / ++-----------++-----------++-----------++ ... || || || || ... compressed clusters ++-----------++-----------++-----------++ ++->cluster<-++->cluster<-++->cluster<-++ size size size The main point of 'in-place' refers to the decompression mode: Instead of allocating independent compressed pages and data structures, it reuses the allocated file cache pages at most to store its compressed data and the corresponding pagevec in a time-sharing approach by default, which will be useful for low memory scenario. In the end, unlike the other filesystems with (de)compression support using a relatively large compression block size, which reads and decompresses >= 128KB at once, and gains a more good-looking random read (In fact it collects small random reads into large sequential reads and caches all decompressed data in memory, but it is unacceptable especially for embedded devices with limited memory, and it is not the real random read), we select a universal small-sized 4KB compressed cluster, which is the smallest page size for most architectures, and all compressed clusters can be read and decompressed independently, which ensures random read number for all use cases. Signed-off-by: -
Gao Xiang authored
This patch introduces another concept used by the unzip subsystem called 'workstation'. It can be seen as a sparse array that stores pointers pointed to data structures related to the corresponding physical blocks. All lookup cases are protected by RCU read lock. Besides, reference count and spin_lock are also introduced to manage its lifetime and serialize all update operations. 'workstation' is currently implemented on the in-kernel radix tree approach for backward compatibility. With the evolution of linux kernel, it could be migrated into XArray implementation in the future. Signed-off-by:
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Gao Xiang authored
This patch adds a dedicated shrinker targeting to free unneeded memory consumed by a number of erofs in-memory data structures. Like F2FS and UBIFS, it also adds: - sbi->umount_mutex to avoid races on shrinker and put_super - sbi->shrinker_run_no to not revisit recently scaned objects Signed-off-by:
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Gao Xiang authored
In order to introducing shrinker solution for erofs, let's manage all mounted erofs instances at first. Signed-off-by:
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Gao Xiang authored
Currently, this patch only simply implements LZ4 decompressor due to its development priority. In the future, erofs will support more compression algorithm and format other than LZ4, thus a generic decompressor interface will be needed. Signed-off-by:
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Gao Xiang authored
We have to reduce the memory cost as much as possible, so we don't want to decompress more data beyond the output buffer size, however "LZ4_decompress_safe_partial" doesn't guarantee to stop at the arbitary end position, but stop just after its current LZ4 "sequence" is completed. Link: https://groups.google.com/forum/#!topic/lz4c/_3kkz5N6n00 Therefore, I hacked the LZ4 decompression logic by hand, probably NOT the fastest approach, and hope for better implementation. Signed-off-by:
Miao Xie <miaoxie@huawei.com> Signed-off-by:
Chao Yu <yuchao0@huawei.com> Signed-off-by:
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Gao Xiang authored
The unzip subsystem also uses these functions, let's export them to internal.h. Signed-off-by:
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Gao Xiang authored
This patch introduces an temporary _on-stack_ page pool to reuse the freed page directly as much as it can for better performance and release all pages at a time, it also slightly reduces the possibility of the potential memory allocation failure. Signed-off-by:
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Gao Xiang authored
This patch introduces an iterable L2P mapping operation 'erofs_map_blocks_iter'. Compared with 'erofs_map_blocks', it avoids a number of redundant 'release and regrab' processes if they request the same meta page. Signed-off-by:
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Gao Xiang authored
For each compressed cluster, there is a straight-forward way of allocating a fixed or variable-sized (for VLE) array to record the corresponding file pages for its decompression if we decide to decompress these pages asynchronously (eg. read-ahead case), however it could take much extra on-heap memory compared with traditional uncompressed filesystems. This patch introduces a pagevec solution to reuse some allocated file page in the time-sharing approach storing parts of the array itself in order to minimize the extra memory overhead, thus only a constant and small-sized array used for booting the whole array itself up will be needed. Signed-off-by:
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Gao Xiang authored
Currently kernel has scattered tagged pointer usages hacked by hand in plain code, without a unique and portable functionset to highlight the tagged pointer itself and wrap these hacked code in order to clean up all over meaningless magic masks. Therefore, this patch introduces simple generic methods to fold tags into a pointer integer. It currently supports the last n bits of the pointer for tags, which can be selected by users. In addition, it will also be used for the upcoming EROFS filesystem, which heavily uses tagged pointer approach for high performance and reducing extra memory allocation. Link: https://en.wikipedia.org/wiki/Tagged_pointerSigned-off-by:
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Chao Yu authored
Add basic tracepoints for ->readpage{,s}, ->lookup, ->destroy_inode, fill_inode and map_blocks. Reviewed-by: -
Chao Yu authored
This patch introduces error injection infrastructure, with it, we can inject error in any kernel exported common functions which erofs used, so that it can force erofs running into error paths, it turns out that tests can cover real rare paths more easily to find bugs. Reviewed-by:
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Chao Yu authored
This patch adds to support special inode, such as block dev, char, socket, pipe inode. Reviewed-by:
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Gao Xiang authored
This implements xattr and acl functionalities. Inline and shared xattrs are introduced for flexibility. Specifically, if the same xattr occurs for many times in a large number of inodes or the value of a xattr is so large that it isn't suitable to be inlined, a shared xattr kept in the xattr meta will be used instead. Signed-off-by:
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Gao Xiang authored
This commit adds Makefile and Kconfig for erofs, and updates Makefile and Kconfig files in the fs directory. Signed-off-by:
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Gao Xiang authored
This commit adds functions that transfer names to inodes. Signed-off-by:
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