Zhenghao Gu <imguzh@xxxxxxxxx> wrote: > virt_to_phys() doesn't work on systems with IOMMU enabled, which have > non-identity physical-to-IOVA mappings. It leads to IO_PAGE_FAULTs like this: > > [IO_PAGE_FAULT domain=0x0023 address=0x1cce00000 flags=0x0020] > > And no association to the AP can be established. > > This patch changes that to dma_map_single(), which works correctly. Even > virt_to_phys() documentation says device drivers should not use it: > > This function does not give bus mappings for DMA transfers. In > almost all conceivable cases a device driver should not be using > this function > > Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1 > > Signed-off-by: Zhenghao Gu <imguzh@xxxxxxxxx> > Acked-by: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx> > Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx> Patch applied to ath-next branch of ath.git, thanks. aaf244141ed7 wifi: ath11k: fix IOMMU errors on buffer rings -- https://patchwork.kernel.org/project/linux-wireless/patch/20231212031914.47339-1-imguzh@xxxxxxxxx/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
