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The DSI runtime PM suspend/resume callbacks check whether msm_host->cfg_hnd is non-NULL before trying to enable the bus clocks. This is done to accommodate early calls to these functions that may happen before the bus clocks are even initialized. Calling pm_runtime_put_autosuspend() in dsi_host_init() can result in racy behaviour since msm_host->cfg_hnd is set very soon after. If the suspend callback happens too late, we end up trying to disable clocks that were never enabled, resulting in a bunch of WARN_ON splats. Use pm_runtime_put_sync() so that the suspend callback is called immediately. Reported-by: Nicolas Dechesne <nicolas.dechesne@linaro.org> Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com> |
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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.