From: "Ján Veselý" <jano.vesely@gmail.com>
To: linux-wireless <linux-wireless@vger.kernel.org>
Cc: yhchuang@realtek.com
Subject: [5.2 regression] rtwpci + amd iommu
Date: Wed, 10 Jul 2019 00:38:32 -0400 [thread overview]
Message-ID: <CA+K+NcRWLeE3-vah=urveMVxcgXYO0yFHYD=WNeuX_TdZ9+8-A@mail.gmail.com> (raw)
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
next reply other threads:[~2019-07-10 4:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-10 4:38 Ján Veselý [this message]
2019-07-10 5:12 ` [5.2 regression] rtwpci + amd iommu Tony Chuang
2019-07-10 6:09 ` Ján Veselý
2019-07-26 18:08 ` Brian Norris
2019-07-30 2:46 ` Tony Chuang
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