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For host commands that take a long time to process, cros ec can return early by signaling a EC_RES_IN_PROGRESS result. The host must then poll status with EC_CMD_GET_COMMS_STATUS until completion of the command. None of the above applies when data link errors are encountered. When errors such as EC_SPI_PAST_END are encountered during command transmission, it usually means the command was not received by the EC. Treating such errors as if they were 'EC_RES_IN_PROGRESS' results is almost always the wrong decision, and can result in host commands silently being lost. Reported-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-by: Brian Norris <briannorris@chromium.org> Tested-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Lee Jones <lee.jones@linaro.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.