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| Filename | Latest commit message | Latest commit date |
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41c80b8a63
Currently we are already setting a pm_runtime_disabled flag and disabling runtime-pm for i2c-busses used for accessing the system PMIC on x86. But this is not enough, there are ACPI opregions which may want to access the PMIC during late-suspend and early-resume, so we need to completely disable pm to be safe. This commit renames the flag from pm_runtime_disabled to pm_disabled and adds the following new behavior if the flag is set: 1) Call dev_pm_syscore_device(dev, true) which disables normal suspend / resume and remove the pm_runtime_disabled check from dw_i2c_plat_resume since that will now never get called. This fixes suspend_late handlers which use ACPI PMIC opregions causing errors like these: PM: Suspending system (freeze) PM: suspend of devices complete after 1127.751 msecs i2c_designware 808622C1:06: timeout waiting for bus ready ACPI Exception: AE_ERROR, Returned by Handler for [UserDefinedRegion] acpi 80860F14:02: Failed to change power state to D3hot PM: late suspend of devices failed 2) Set IRQF_NO_SUSPEND irq flag. This fixes resume_early handlers which handlers which use ACPI PMIC opregions causing errors like these: PM: resume from suspend-to-idle i2c_designware 808622C1:06: controller timed out ACPI Exception: AE_ERROR, Returned by Handler for [UserDefinedRegion] Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> |
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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.