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2020-03-25.gitignore: add SPDX License IdentifierMasahiro Yamada1-0/+1
Add SPDX License Identifier to all .gitignore files. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-22media: selftests: media_dev_allocator api testShuah Khan1-0/+85
Add a new test for Media Device Allocator API. Media Device Allocator API to allows multiple drivers share a media device. This API solves a very common use-case for media devices where one physical device (an USB stick) provides both audio and video. When such media device exposes a standard USB Audio class, a proprietary Video class, two or more independent drivers will share a single physical USB bridge. In such cases, it is necessary to coordinate access to the shared resource. Using this API, drivers can allocate a media device with the shared struct device as the key. Once the media device is allocated by a driver, other drivers can get a reference to it. The media device is released when all the references are released. This test does a series of unbind/bind tests to make sure media device is released correctly when it is no longer is use and when the last driver releases the reference. Signed-off-by: Shuah Khan <shuah@kernel.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-05-30selftests: media_tests: return Kselftest Skip code for skipped testsShuah Khan (Samsung OSG)3-9/+10
When media_tests test is skipped because of unmet dependencies and/or unsupported configuration, it exits with error which is treated as a fail by the Kselftest framework. This leads to false negative result even when the test could not be run. Change it to return kselftest skip code when a test gets skipped to clearly report that the test could not be run. Change it to use ksft_exit_skip() when the test is skipped. Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
2018-05-30selftests: media_tests: fix spelling mistake: "iternations" -> "iterations"Colin Ian King1-1/+1
Trivial fix to spelling mistake in message text Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
2018-01-12selftests: media_tests: Add SPDX license identifierShuah Khan3-3/+6
Replace GPL license statement with SPDX GPL-2.0 license identifier. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2018-01-12selftests: media_tests: Fix Makefile 'clean' target warningShuah Khan1-5/+2
Remove 'clean' target and change TEST_PROGS to TEST_GEN_PROGS so the common lib.mk 'clean' target clean these generated files. TEST_PROGS is for shell scripts and not for generated test executables. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman3-0/+3
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-07-26selftests: media_tests add a new video device testShuah Khan3-2/+103
Add a new video device test that opens user specified Video Device and calls video ioctls in a loop once every 10 seconds. This test is intended for testing device removal and driver unbind while an ioctl is active. Clean device removal and driver unbind is expected without any use-after-free and panics. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-06-27selftests: media_tests - Add media_device_open to .gitignoreShuah Khan1-0/+1
Add media_device_open to .gitignore Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-06-27selftests: add media controller regression test scripts and documentShuah Khan3-0/+65
Add regression test scripts open_loop_test.sh, and bind_unbind_sample.sh. Also add regression_test.txt that describes the regression test procedure. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-06-27selftests: add media_device_open testShuah Khan2-2/+83
Add a new media test to open, run ioctl, and close the media device file. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-06-27selftests: media_device_test change it to randomize loop countShuah Khan1-6/+13
Change it to randomize the loop count instead of hardcoded number of times ioctl is called. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-02-25selftests: media_dcevice_test fix usage informationShuah Khan1-1/+1
Fix the incorrect usage information. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-02-25selftests: media_dcevice_test fix to handle ioctl failure caseShuah Khan1-2/+3
Fix to print information returned by ioctl only when it returns success. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-02-25selftests: add a new test for Media Controller APIShuah Khan3-0/+102
This test opens user specified Media Device and calls MEDIA_IOC_DEVICE_INFO ioctl in a loop once every 10 seconds. This test is for detecting errors in device removal path. Usage: sudo ./media_device_test -d /dev/mediaX While test is running, remove the device and ensure there are no use after free errors and other Oops in the dmesg. Enable KaSan kernel config option for use-after-free error detection. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>