On 2014年06月14日 05:46, David Rientjes wrote:
> On Fri, 13 Jun 2014, Lan Tianyu wrote:
>
>> How about this?
>>
>> - result = acpi_battery_update(battery, false);
>> - if (result)
>> +
>> + /*
>> + * Some machines'(E,G Lenovo Z480) ECs are not stable
>> + * during boot up and this causes battery driver fails to be
>> + * probed due to failure of getting battery information
>> + * from EC sometimes. After several retries, the operation
>> + * may work. So add retry code here and 20ms sleep between
>> + * every retries.
>> + */
>> + while (acpi_battery_update(battery, false) && retry--)
>> + msleep(20);
>> + if (!retry) {
>> + result = -ENODEV;
>> goto fail;
>> + }
>> +
>
> I think you want --retry and not retry--.
My original purpose is to retry 5 times after the first try fails.
If use "--retry" here, it just retries 4 times.
> Otherwise it's possible for the
> final call to acpi_battery_update() to succeed and now it's returning
> -ENODEV.
>
Yes, it maybe and I will change code like the following.
while ((result = acpi_battery_update(battery, false)) && retry--)
msleep(20);
if (result)
goto fail;
--
Best regards
Tianyu Lan
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