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Subject: Re: MT76x2U crashes XHCI driver on AMD Ryzen system
From:   Rosen Penev <rosenp@gmail.com>
In-Reply-To: <CAJ0CqmVNF83bWgc+LSQ3_i=zfp-sXC5Nf=nKfqB3SWa8r7sKdQ@mail.gmail.com>
Date:   Fri, 11 Jan 2019 11:01:52 -0800
Cc:     linux-wireless <linux-wireless@vger.kernel.org>
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Message-Id: <83A1D243-9073-48D1-9F26-5A2581DCB829@gmail.com>
References: <CAKxU2N9o5WeUwFMUwwXKHaPj7R+oiSKV1c2n8RtXwGNZRtw5Sw@mail.gmail.com> <CAJ0CqmVNF83bWgc+LSQ3_i=zfp-sXC5Nf=nKfqB3SWa8r7sKdQ@mail.gmail.com>
To:     Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Sender: linux-wireless-owner@vger.kernel.org
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On Jan 11, 2019, at 09:29, Lorenzo Bianconi <lorenzo.bianconi@redhat.com> wr=
ote:

>>=20
>> I have an ALFA AWUS036ACM and whenever I plug it in, the XHCI driver
>> dies. This is on an ASRock X370 motherboard. Kernel 4.20 Arch Linux.
>>=20
>> After plugging in the adapter, the integrated wireless chip (Intel
>> 3168) also dies. Disabling the motherboard wireless does not help.
>> Here are two fairly similar logs. First with Intel 3168 and the second
>> with it disabled in UEFI.
>>=20
>=20
> [...]
>=20
>> Without iwlwifi:
>>=20
>> kernel: usb 1-14: new high-speed USB device number 3 using xhci_hcd
>> kernel: usb 1-14: New USB device found, idVendor=3D0e8d, idProduct=3D7612=
,
>> bcdDevice=3D 1.00
>> kernel: usb 1-14: New USB device strings: Mfr=3D2, Product=3D3, SerialNum=
ber=3D4
>> usb 1-14: Product: Wireless
>> kernel: usb 1-14: Manufacturer: MediaTek Inc.
>> kernel: usb 1-14: SerialNumber: 000000000
>> mtp-probe[1400]: checking bus 1, device 3:
>> "/sys/devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-14"
>> mtp-probe[1400]: bus: 1, device: 3 was not an MTP device
>> kernel: usb 1-14: reset high-speed USB device number 3 using xhci_hcd
>> kernel: mt76x2u 1-14:1.0: ASIC revision: 76120044
>> kernel: mt76x2u 1-14:1.0: ROM patch build: 20140408060640a
>> kernel: xhci_hcd 0000:03:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT
>=20
> Are you using the driver in a VM or directly in the host? This is an
> error reported by AMD iommu driver
Direct. No VM used. This is the only peripheral causing this issue.
>=20
> Regards,
> Lorenzo