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Message-Id: <1386419801-10091-1-git-send-email-jan.vcelak@nic.cz> Date: Sat, 7 Dec 2013 13:36:41 +0100 From: Jan Vcelak <jan.vcelak@....cz> To: lenb@...nel.org, rjw@...ysocki.net, linux-acpi@...r.kernel.org Cc: linux-kernel@...r.kernel.org Subject: [PATCH] ACPI: full battery charge cannot exceed current one Some degraded batteries report maximal capacity to be smaller than current charge of the battery. This can confuse some user space applications (like upower). This patch handles the situation by increasing maximal capacity of the battery if it exceedes current charge. Signed-off-by: Jan Vcelak <jan.vcelak@....cz> --- upower: fully charged battery reported as 0% charged https://bugzilla.redhat.com/show_bug.cgi?id=1025980 drivers/acpi/battery.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index fbf1ace..71ec1f6 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -494,6 +494,11 @@ static int acpi_battery_get_state(struct acpi_battery *battery) battery->capacity_now = battery->capacity_now * 10000 / battery->design_voltage; } + + /* Some degraded batteries report lower full charge than current one. */ + if (battery->capacity_now > battery->full_charge_capacity) + battery->full_charge_capacity = battery->capacity_now; + return result; } -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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