[PATCH] wifi: ath12k: do not process consecutive RDDM event

[Jeff Johnson]

On 5/28/2024 6:53 PM, Baochen Qiang wrote:
> Currently we do reset for each RDDM event from MHI, however there are
> cases, see below log, that we get two or more consecutive events, and
> it is pointless to do reset for the subsequent ones. What's more, it
> makes reset process more likely to fail.
> 
> [  103.289864] mhi mhi0: System error detected
> [  103.289871] ath12k_pci 0000:03:00.0: mhi notify status reason MHI_CB_EE_RDDM
> [  103.293144] mhi mhi0: System error detected
> [  103.293150] ath12k_pci 0000:03:00.0: mhi notify status reason MHI_CB_EE_RDDM
> 
> Add a check to avoid reset again and again. This is done by tracking previous
> MHI status: if we receive a new RDDM event while the previous event is
> also the same, we treat it as duplicate and ignore it, because normally
> we should at least receive a MHI_CB_EE_MISSION_MODE event between them.
> 
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
> 
> Signed-off-by: Baochen Qiang <quic_bqiang at quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson at quicinc.com>