1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 9530f4478ae2..1ce197f499f1 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -32,6 +32,7 @@
 #include <linux/jiffies.h>
 #include <linux/async.h>
 #include <linux/dmi.h>
+#include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/suspend.h>
 #include <asm/unaligned.h>
@@ -70,6 +71,7 @@ MODULE_DESCRIPTION("ACPI Battery Driver");
 MODULE_LICENSE("GPL");
 
 static int battery_bix_broken_package;
+static int battery_notification_delay_ms;
 static unsigned int cache_time = 1000;
 module_param(cache_time, uint, 0644);
 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
@@ -1062,6 +1064,14 @@ static void acpi_battery_notify(struct acpi_device *device, u32 event)
         if (!battery)
                 return;
         old = battery->bat.dev;
+        /*
+        * On Acer Aspire V5-573G notifications are sometimes triggered too
+        * early. For example, when AC is unplugged and notification is
+        * triggered, battery state is still reported as "Full", and changes to
+        * "Discharging" only after short delay, without any notification.
+        */
+        if (battery_notification_delay_ms > 0)
+                msleep(battery_notification_delay_ms);
         if (event == ACPI_BATTERY_NOTIFY_INFO)
                 acpi_battery_refresh(battery);
         acpi_battery_update(battery, false);
@@ -1112,6 +1122,12 @@ static int battery_bix_broken_package_quirk(const struct dmi_system_id *d)
         return 0;
 }
 
+static int battery_notification_delay_quirk(const struct dmi_system_id *d)
+{
+        battery_notification_delay_ms = 1000;
+        return 0;
+}
+
 static struct dmi_system_id bat_dmi_table[] = {
         {
                 .callback = battery_bix_broken_package_quirk,
@@ -1121,6 +1137,14 @@ static struct dmi_system_id bat_dmi_table[] = {
                         DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"),
                 },
         },
+        {
+                .callback = battery_notification_delay_quirk,
+                .ident = "Acer Aspire V5-573G",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"),
+                },
+        },
         {},
 };