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Koen Kooi
189ce92b4c
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
52 lines
1.5 KiB
Diff
52 lines
1.5 KiB
Diff
From f01aa357417f413fff9af7ef10496ece02d2c8d7 Mon Sep 17 00:00:00 2001
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From: Andy Whitcroft <apw@canonical.com>
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Date: Thu, 3 May 2012 14:48:26 +0100
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Subject: [PATCH 75/86] ACPI battery: only refresh the sysfs files when
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pertinent information changes
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commit c5971456964290da7e98222892797b71ef793e62 upstream.
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We only need to regenerate the sysfs files when the capacity units
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change, avoid the update otherwise.
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The origin of this issue is dates way back to 2.6.38:
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da8aeb92d4853f37e281f11fddf61f9c7d84c3cd
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(ACPI / Battery: Update information on info notification and resume)
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Signed-off-by: Andy Whitcroft <apw@canonical.com>
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Tested-by: Ralf Jung <post@ralfj.de>
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Signed-off-by: Len Brown <len.brown@intel.com>
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Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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---
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drivers/acpi/battery.c | 10 +++++++++-
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1 file changed, 9 insertions(+), 1 deletion(-)
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diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
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index 7711d94..5535477 100644
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--- a/drivers/acpi/battery.c
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+++ b/drivers/acpi/battery.c
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@@ -643,11 +643,19 @@ static int acpi_battery_update(struct acpi_battery *battery)
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static void acpi_battery_refresh(struct acpi_battery *battery)
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{
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+ int power_unit;
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+
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if (!battery->bat.dev)
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return;
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+ power_unit = battery->power_unit;
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+
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acpi_battery_get_info(battery);
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- /* The battery may have changed its reporting units. */
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+
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+ if (power_unit == battery->power_unit)
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+ return;
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+
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+ /* The battery has changed its reporting units. */
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sysfs_remove_battery(battery);
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sysfs_add_battery(battery);
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}
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--
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1.7.9.5
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