[PATCH] wifi: ath11k: fix BUFFER_DONE read on monitor ring rx buffer

[Kalle Valo]

Harshitha Prem <quic_hprem at quicinc.com> wrote:

> Perform dma_sync_single_for_cpu() on monitor ring rx buffer before
> reading BUFFER_DONE tag and do dma_unmap_single() only after device
> had set BUFFER_DONE tag to the buffer.
> 
> Also when BUFFER_DONE tag is not set, allow the buffer to get read
> next time without freeing skb.
> 
> This helps to fix AP+Monitor VAP with flood traffic scenario to see
> monitor ring rx buffer overrun missing BUFFER_DONE tag to be set.
> 
> Also remove redundant rx dma buf free performed on DP
> rx_mon_status_refill_ring.
> 
> Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Sathishkumar Muruganandam <quic_murugana at quicinc.com>
> Signed-off-by: Harshitha Prem <quic_hprem at quicinc.com>
> Signed-off-by: Kalle Valo <quic_kvalo at quicinc.com>

Patch applied to ath-next branch of ath.git, thanks.

68e93ac5a31d wifi: ath11k: fix BUFFER_DONE read on monitor ring rx  buffer

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20230309164434.32660-1-quic_hprem@quicinc.com/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches