When an I2C HID device is powered of during system sleep, as a result of removing its power resources (by the ACPI core) the interrupt line might go low as well. This results inadvertent interrupt and wakes the system from sleep immediately.
To prevent this we disable the device interrupt in the drivers suspend method and enable it on resume. The device can still wake the system up if it is wake capable (this also means that not all of its power will be removed to keep the interrupt line high). Reported-by: Jerome Blin <jerome.b...@intel.com> Signed-off-by: Mika Westerberg <mika.westerb...@linux.intel.com> --- drivers/hid/i2c-hid/i2c-hid.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c index c1336193b04b..dc8b575477b4 100644 --- a/drivers/hid/i2c-hid/i2c-hid.c +++ b/drivers/hid/i2c-hid/i2c-hid.c @@ -1073,6 +1073,7 @@ static int i2c_hid_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); + disable_irq(client->irq); if (device_may_wakeup(&client->dev)) enable_irq_wake(client->irq); @@ -1087,6 +1088,7 @@ static int i2c_hid_resume(struct device *dev) int ret; struct i2c_client *client = to_i2c_client(dev); + enable_irq(client->irq); ret = i2c_hid_hwreset(client); if (ret) return ret; -- 1.8.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/