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| author | Tony W Wang-oc <TonyWWang-oc@zhaoxin.com> | 2026-06-08 22:03:59 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2026-06-08 15:42:07 +0300 |
| commit | 66c62e6773c54ce5233eb21c6d48999c3747bd13 (patch) | |
| tree | 06d79a520a36b39a42abbfa541e7ad9fc15b9d9a /include/linux/debugobjects.h | |
| parent | 4549871118cf616eecdd2d939f78e3b9e1dddc48 (diff) | |
| download | linux-66c62e6773c54ce5233eb21c6d48999c3747bd13.tar.xz | |
ACPI: processor: Add cpuidle driver check in acpi_processor_register_idle_driver()
Commit 7a8c994cbb2d ("ACPI: processor: idle: Optimize ACPI idle
driver registration") moved the ACPI idle driver registration to
acpi_processor_driver_init(), but it didn't check whether a cpuidle
driver was already registered.
For example, on Intel platforms, if the intel_idle driver is already
loaded, the code would still evaluate the _CST object in the ACPI
table and attempt to register the acpi_idle driver. This registration
would fail with -EBUSY due to the existing check in cpuidle_register_driver.
Add a check at the beginning of acpi_processor_register_idle_driver()
to avoid unnecessary _CST evaluate and potential registration failures.
Fixes: 7a8c994cbb2d ("ACPI: processor: idle: Optimize ACPI idle driver registration")
Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
Link: https://patch.msgid.link/20260608190359.3254-1-TonyWWang-oc@zhaoxin.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/debugobjects.h')
0 files changed, 0 insertions, 0 deletions