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IRQ polling logic has been implemented to drain the post-boot/resume EC events: 1. Triggered by the following code, invoked from acpi_ec_enable_event(): if (!test_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) advance_transaction(ec); 2. Drained by the following code, invoked after acpi_ec_complete_query(): if (status & ACPI_EC_FLAG_SCI) acpi_ec_submit_query(ec); This facility is safer than the old CLEAR_ON_RESUME quirk as the CLEAR_ON_RESUME quirk sends EC query commands unconditionally. The behavior is apparently not suitable for firmware that requires QUERY_HANDSHAKE quirk. Though the QUERY_HANDSHAKE quirk isn't used now because of the improvement done in the EC transaction state machine (ec_event_clearing=QUERY), it is the proof that we cannot send EC query command unconditionally. So it's time to delete the out-dated CLEAR_ON_RESUME quirk to let the users to try the newer approach. Link: https://bugzilla.kernel.org/show_bug.cgi?id=191211 Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
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| samples | ||
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| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.