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Commit662591461c(ACPI / EC: Drop EC noirq hooks to fix a regression) modified the ACPI EC driver so that it doesn't switch over to busy polling mode during noirq stages of system suspend and resume in an attempt to fix an issue resulting from that behavior. However, that modification introduced a system resume regression on Thinkpad X240, so make the EC driver switch over to the polling mode during noirq stages of system suspend and resume again, which effectively reverts the problematic commit. Fixes:662591461c(ACPI / EC: Drop EC noirq hooks to fix a regression) Link: https://bugzilla.kernel.org/show_bug.cgi?id=197863 Reported-by: Markus Demleitner <m@tfiu.de> Tested-by: Markus Demleitner <m@tfiu.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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.