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| author | Petr Pavlu <petr.pavlu@suse.com> | 2023-05-11 14:53:12 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-05-15 19:59:29 +0200 |
| commit | 73c7f8246539da12c76bb731a2fe7389ae55eae8 (patch) | |
| tree | 543e5fa8476e2140938759abe53d94445c9cd799 /init | |
| parent | f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 (diff) | |
cpufreq: ACPI: Prevent a warning when another frequency driver is loaded
The recent change to use platform devices to load ACPI PPC and PCC
drivers caused that a misleading warning is reported when a respective
module cannot be loaded because another CPU frequency driver is already
registered:
kernel: acpi-cpufreq: probe of acpi-cpufreq failed with error -17
Address it by changing the return code in acpi-cpufreq and pcc-cpufreq
for this case from -EEXIST to -ENODEV which silences the warning in
call_driver_probe().
The change has also a benefit for users of init_module() as this return
code is propagated out from the syscall. The previous -EEXIST code made
the callers, such as kmod, wrongly believe that the module was already
loaded instead of that it failed to load.
Fixes: 691a63712347 ("ACPI: cpufreq: Use platform devices to load ACPI PPC and PCC drivers")
Reported-by: Kevin Locke <kevin@kevinlocke.name>
Link: https://lore.kernel.org/lkml/ZFreh8SDMX67EaB6@kevinlocke.name/
Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>
Tested-by: Kevin Locke <kevin@kevinlocke.name>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions