qcacld-3.0: Reduce packet loss while roaming
As soon as the firmware is done with the roaming scan and about to
start hand-off, it will notify the host that the roaming is about
to start using WMI_ROAM_NOTIF_ROAM_START. The host driver will
then notify the upper layers to stop sending the packets and
the host later informs them as part of roam synch propagation
after roaming is done to start sending the packets.
Once the firmware sends the notification and if it fails to roam
for some reason, then it will send another notification
WMI_ROAM_NOTIF_ROAM_ABORT to let the host know the upper layers
to resume sending the packets again.
Introduce an operation code for the CSR roaming callback to determine
what it needs to do when called by the lower layers.
CRs-Fixed: 996949
Change-Id: I674262b95f1781747b34fb675ad179952a8ae4d1
9 files changed