From: Po-Hao Huang <phhuang@xxxxxxxxxxx> Without this patch, our hardware attempts to perform dma while device cpu restarts, and leads to iommu page faults caused by invalid requests. Some platforms show warning messages as below: rtw89_8852ce 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000a address=0x10000000004 flags=0x0030] Signed-off-by: Po-Hao Huang <phhuang@xxxxxxxxxxx> Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx> --- drivers/net/wireless/realtek/rtw89/pci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c index 73b3b7e9fe6f5..19217a6951c97 100644 --- a/drivers/net/wireless/realtek/rtw89/pci.c +++ b/drivers/net/wireless/realtek/rtw89/pci.c @@ -1627,6 +1627,8 @@ static void rtw89_pci_ctrl_dma_all(struct rtw89_dev *rtwdev, bool enable) else rtw89_write32_clr(rtwdev, R_AX_PCIE_INIT_CFG1, B_AX_STOP_AXI_MST); + rtw89_write32_clr(rtwdev, R_AX_PCIE_INIT_CFG1, + txhci_en | rxhci_en); if (chip_id == RTL8852C) rtw89_write32_set(rtwdev, R_AX_PCIE_INIT_CFG1, B_AX_STOP_AXI_MST); -- 2.25.1
