Re: [PATCH] Bluetooth: Don't restart scanning if paused

[Marcel Holtmann]

Hi Abhishek,

> When restarting LE scanning, check if it's currently paused before
> enabling passive scanning.
> 
> Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx>
> ---
> When running suspend stress tests on Chromebooks, we discovered
> instances where the Chromebook didn't enter the deepest idle states
> (i.e. S0ix). After some debugging, we found that passive scanning was
> being enabled AFTER the suspend notifier had run (and disabled all
> scanning).
> 
> For this fix, I simply looked at all the places where we call
> HCI_OP_LE_SET_SCAN_ENABLE and added a guard clause for suspend. With
> this fix, we were able to get through 100+ iterations of the suspend
> stress test without any problems entering S0ix.
> 
> 
> net/bluetooth/hci_request.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel