> Hi, > > after updating to 5.2 the wi-fi driver stopped working when the iommu > is enabled. > It fails to list the available wi-fi networks or connect to a known one. > booting with amd_iommu=off works around the problem. > The staging version in 5.1 and older worked OK with the iommu enabled > > The device is: > 04:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8822BE > 802.11a/b/g/n/ac WiFi adapter > > I do see an IOMMU error in dmesg, but the originating device does not > match the nics pci location: > Jul 08 15:03:14 host kernel: rtw_pci 0000:04:00.0: start vif > xx:xx:xx:xx:xx:xx on port 0 > Jul 08 15:03:14 host kernel: iommu ivhd0: AMD-Vi: Event logged > [INVALID_DEVICE_REQUEST device=00:00.1 pasid=0x00000 > address=0xfffffffdf8140200 flags=0x0a00] > Jul 08 15:03:14 host kernel: rtw_pci 0000:04:00.0: stop vif > xx:xx:xx:xx:xx:xx on port 0 > Jul 08 15:03:14 host NetworkManager[790]: <info> [1562612594.8992] > device (wlp4s0): set-hw-addr: set MAC address to yy:yy:yy:yy:yy:yy > (scanning) > Jul 08 15:03:15 host kernel: rtw_pci 0000:04:00.0: start vif > yy:yy:yy:yy:yy:yy on port 0 > > let me know if I should provide any further info. > thanks, > Jan > Hi, I am not sure if enabling MSI interrupt is going to help. You can try the patch attached, if it works, I will send it to upstream. Thanks Yan-Hsuan
Attachment:
0001-rtw88-pci-add-MSI-interrupt-support.patch
Description: 0001-rtw88-pci-add-MSI-interrupt-support.patch
