Manikanta Pubbisetty <quic_mpubbise@xxxxxxxxxxx> wrote: > When the system shuts down, SMMU driver will be stopped and > will not assist in IOVA translations. SMMU driver expects all > of its consumers to shutdown before shutting down itself. > WCN6750 being one of the consumer device should not perform any > DMA operations after the SMMU has shutdown which will otherwise > result in SMMU faults. > > SMMU driver will call the shutdown() callback of all its > consumer devices and the consumers shall stop further DMA > activity after the invocation of their respective shutdown() > callbacks. > > Register the shutdown() callback to the platform core for WCN6750. > Change will not impact other AHB ath11k devices. > > Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.1.0.1-00887-QCAMSLSWPLZ-1 > > Signed-off-by: Manikanta Pubbisetty <quic_mpubbise@xxxxxxxxxxx> > Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx> Patch applied to ath-next branch of ath.git, thanks. ac41c2b642b1 wifi: ath11k: Register shutdown handler for WCN6750 -- https://patchwork.kernel.org/project/linux-wireless/patch/20220720134710.15523-1-quic_mpubbise@xxxxxxxxxxx/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
