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rtw89: 8852c: disable dma during mac init

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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@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220704023453.19935-2-pkshih@realtek.com
This commit is contained in:
Po-Hao Huang 2022-07-04 10:34:48 +08:00 committed by Kalle Valo
parent deebea35d6
commit 0e91d191cf
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wireless/realtek/rtw89/pci.c
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@ -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);