[PATCH] ath11k: Handle keepalive during wowlan suspend and resume

[Jeff Johnson]

On 5/4/2022 6:46 PM, Baochen Qiang wrote:
> With wowlan enabled and after sleeping for a rather long time,

nit: s/wowlan/WoWLAN/ to conform to common usage (also in subject)

> we are seeing that with some APs, it is not able to wake up
> the STA though the correct wake up pattern has been configured.
> This is because the host doesn't send keepalive command to
> firmware, thus firmware will not send any packet to the AP and
> after a specific time the AP kicks out the DUT.
> 
> Fix this issue by enabling keepalive before going to suspend
> and disabling it after resume back.
> 
> Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1
> 
> Signed-off-by: Baochen Qiang <quic_bqiang at quicinc.com>
> ---

[...]

> +
> +enum wmi_sta_keepalive_method {
> +	WMI_STA_KEEPALIVE_METHOD_NULL_FRAME = 1, /* 802.11 NULL frame */
> +	WMI_STA_KEEPALIVE_METHOD_UNSOLICITED_ARP_RESPONSE = 2, /* ARP response */
> +	WMI_STA_KEEPALIVE_METHOD_ETHERNET_LOOPBACK = 3, /*ETHERNET LOOPBACK*/
> +	WMI_STA_KEEPALIVE_METHOD_GRATUITOUS_ARP_REQUEST = 4, /* gratuitous ARP req*/

nit: for the two above consistently have space separating comment from 
/* and */

> +	WMI_STA_KEEPALIVE_METHOD_MGMT_VENDOR_ACTION = 5, /* vendor action frame */
> +};
[...]