ACPI / battery: Do not export energy_full[_design] on devices without full_charge_capacity

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On some devices (with a buggy _BIX implementation) full_charge_capacity
always reports as 0. This means that our energy_full sysfs attribute will
also always be 0, which is not useful to export.

Worse we calculate our reported capacity on full_charge_capacity and if it
is 0 we always report 0. This causes userspace to immediately shutdown or
hibernate the laptop since it assumes that the battery is critically low.

This commit makes us not report energy_full[_design] or capacity on such
broken devices, avoiding the immediate shutdown / hibernate from userspace.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=83941
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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Hans de Goede 2018-08-07 09:36:30 +02:00 • committed by Rafael J. Wysocki

parent 2754435d4c

commit b41901a2cf

1 changed files with 19 additions and 0 deletions

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drivers/acpi/battery.c

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