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c92316bf8e
The firmware API has a feature to enable batching requests for the same fil e under one worker, so only one lookup is done. This only triggers if we so happen to schedule two lookups for same file around the same time, or if release_firmware() has not been called for a successful firmware call. This can happen for instance if you happen to have multiple devices and one device driver for certain drivers where the stars line up scheduling wise. This adds a new sync and async test trigger. Instead of adding a new trigger for each new test type we make the tests a bit configurable so that we could configure the tests in userspace and just kick a test through a few basic triggers. With this, for instance the two types of sync requests: o request_firmware() and o request_firmware_direct() can be modified with a knob. Likewise the two type of async requests: o request_firmware_nowait(uevent=true) and o request_firmware_nowait(uevent=false) can be configured with another knob. The call request_firmware_into_buf() has no users... yet. The old tests are left in place as-is given they serve a few other purposes which we are currently not interested in also testing yet. This will change later as we will be able to just consolidate all tests under a few basic triggers with just one general configuration setup. We perform two types of tests, one for where the file is present and one for where the file is not present. All test tests go tested and they now pass for the following 3 kernel builds possible for the firmware API: 0. Most distro setup: CONFIG_FW_LOADER_USER_HELPER_FALLBACK=n CONFIG_FW_LOADER_USER_HELPER=y 1. Android: CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y CONFIG_FW_LOADER_USER_HELPER=y 2. Rare build: CONFIG_FW_LOADER_USER_HELPER_FALLBACK=n CONFIG_FW_LOADER_USER_HELPER=n Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.