Youghandhar Chintala <quic_youghand@xxxxxxxxxxx> wrote: > Currently host can send two WMI commands at once. There is possibility to > cause SMMU issues or corruption, if host wants to initiate 2 DMA > transfers, it is possible when copy complete interrupt for first DMA > reaches host, CE has already updated SRRI (Source ring read index) for > both DMA transfers and is in the middle of 2nd DMA. Host uses SRRI > (Source ring read index) to interpret how many DMA’s have been completed > and tries to unmap/free both the DMA entries. Hence now it is limiting to > one.Because CE is still in the middle of 2nd DMA which can cause these > issues when handling two DMA transfers. > > This change will not impact other targets, as it is only for WCN3990. > > Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.2.0-01387-QCAHLSWMTPLZ-1 > > Signed-off-by: Youghandhar Chintala <quic_youghand@xxxxxxxxxxx> > Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx> Patch applied to ath-next branch of ath.git, thanks. d81bbb684c25 wifi: ath10k: Set tx credit to one for WCN3990 snoc based devices -- https://patchwork.kernel.org/project/linux-wireless/patch/20220801134941.15216-1-quic_youghand@xxxxxxxxxxx/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
