Hi Barnabás,
Thank you for reviewing theis patch! I've Cced a new version to you.
On Thu, Oct 15, 2020 at 10:33:50AM +0000, Barnabás Pőcze wrote:
Hi,
I believe this patch causes I2C HID devices not to work with IRQs after resuming
from suspend.
[...]
#ifdef CONFIG_PM_SLEEP
@@ -1183,7 +1292,8 @@ static int i2c_hid_suspend(struct device *dev)
/* Save some power */
i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
- disable_irq(client->irq);
+ if (polling_mode == I2C_POLLING_DISABLED)
+ disable_irq(client->irq);
The IRQ is disabled when suspending if polling is *off*.
if (device_may_wakeup(&client->dev)) {
wake_status = enable_irq_wake(client->irq);
@@ -1216,7 +1326,7 @@ static int i2c_hid_resume(struct device *dev)
if (ihid->pdata.post_power_delay_ms)
msleep(ihid->pdata.post_power_delay_ms);
- } else if (ihid->irq_wake_enabled) {
+ } else if (ihid->irq_wake_enabled && polling_mode != I2C_POLLING_DISABLED) {
As a side note, I'm not sure if the 'polling_mode != I2C_POLLING_DISABLED' part
is necessary (or that it's necessary *here*). It causes 'i2c_hid_resume' and
'i2c_hid_suspend' to be "asymmetric" which - I believe - may cause problems.
wake_status = disable_irq_wake(client->irq);
if (!wake_status)
ihid->irq_wake_enabled = false;
@@ -1225,7 +1335,8 @@ static int i2c_hid_resume(struct device *dev)
wake_status);
}
- enable_irq(client->irq);
+ if (polling_mode != I2C_POLLING_DISABLED)
+ enable_irq(client->irq);
The IRQ is enabled when resuming if polling is *on*. It should be enabled if polling is *off*
in my opinion.
[...]
Regards,
Barnabás Pőcze
--
Best regards,
Coiby
