diff options
| -rw-r--r-- | drivers/acpi/battery.c | 72 |
1 files changed, 48 insertions, 24 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 93ecae55fe6a..05fe9ebfb9b5 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -430,39 +430,24 @@ static int acpi_battery_get_status(struct acpi_battery *battery) return 0; } -static int acpi_battery_get_info(struct acpi_battery *battery) + +static int extract_battery_info(const int use_bix, + struct acpi_battery *battery, + const struct acpi_buffer *buffer) { int result = -EFAULT; - acpi_status status = 0; - char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ? - "_BIX" : "_BIF"; - - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - if (!acpi_battery_present(battery)) - return 0; - mutex_lock(&battery->lock); - status = acpi_evaluate_object(battery->device->handle, name, - NULL, &buffer); - mutex_unlock(&battery->lock); - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); - return -ENODEV; - } - - if (battery_bix_broken_package) - result = extract_package(battery, buffer.pointer, + if (use_bix && battery_bix_broken_package) + result = extract_package(battery, buffer->pointer, extended_info_offsets + 1, ARRAY_SIZE(extended_info_offsets) - 1); - else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) - result = extract_package(battery, buffer.pointer, + else if (use_bix) + result = extract_package(battery, buffer->pointer, extended_info_offsets, ARRAY_SIZE(extended_info_offsets)); else - result = extract_package(battery, buffer.pointer, + result = extract_package(battery, buffer->pointer, info_offsets, ARRAY_SIZE(info_offsets)); - kfree(buffer.pointer); if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) battery->full_charge_capacity = battery->design_capacity; if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && @@ -483,6 +468,45 @@ static int acpi_battery_get_info(struct acpi_battery *battery) return result; } +static int acpi_battery_get_info(struct acpi_battery *battery) +{ + const int xinfo = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); + int use_bix; + int result = -ENODEV; + + if (!acpi_battery_present(battery)) + return 0; + + + for (use_bix = xinfo ? 1 : 0; use_bix >= 0; use_bix--) { + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + acpi_status status = AE_ERROR; + + mutex_lock(&battery->lock); + status = acpi_evaluate_object(battery->device->handle, + use_bix ? "_BIX":"_BIF", + NULL, &buffer); + mutex_unlock(&battery->lock); + + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", + use_bix ? "_BIX":"_BIF")); + } else { + result = extract_battery_info(use_bix, + battery, + &buffer); + + kfree(buffer.pointer); + break; + } + } + + if (!result && !use_bix && xinfo) + pr_warn(FW_BUG "The _BIX method is broken, using _BIF.\n"); + + return result; +} + static int acpi_battery_get_state(struct acpi_battery *battery) { int result = 0; |