On at least one platform the kernel prints a warning on resume saying
"Unbalanced IRQ 37 wake disable". This is because enable_irq_wake in the
suspend function is failing. This patch checks to see if the call to
enable_irq_wake succeeded before calling disable_irq_wake.
Signed-off-by: Andrew Duggan <adug...@synaptics.com>
---
This patch based on Jiri's for-4.3/i2c-hid and needs Gabriele Mazzotta's
patch which moves where the HID driver's suspend callback call to apply
cleanly.
drivers/hid/i2c-hid/i2c-hid.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index 9ed69b5..1605fbe 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -149,6 +149,8 @@ struct i2c_hid {
int irq;
struct i2c_hid_platform_data pdata;
+
+ bool irq_wake_enabled;
};
static int __i2c_hid_command(struct i2c_client *client,
@@ -1096,8 +1098,8 @@ static int i2c_hid_suspend(struct device *dev)
ret = hid->driver->suspend(hid, PMSG_SUSPEND);
disable_irq(ihid->irq);
- if (device_may_wakeup(&client->dev))
- enable_irq_wake(ihid->irq);
+ if (device_may_wakeup(&client->dev) && !enable_irq_wake(ihid->irq))
+ ihid->irq_wake_enabled = true;
/* Save some power */
i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
@@ -1117,8 +1119,10 @@ static int i2c_hid_resume(struct device *dev)
if (ret)
return ret;
- if (device_may_wakeup(&client->dev))
+ if (device_may_wakeup(&client->dev) && ihid->irq_wake_enabled) {
disable_irq_wake(ihid->irq);
+ ihid->irq_wake_enabled = false;
+ }
if (hid->driver && hid->driver->reset_resume) {
ret = hid->driver->reset_resume(hid);
--
2.1.4
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