[BUG] wireless: mt7601u: probe failed with error -110

[BUG] wireless: mt7601u: probe failed with error -110

[cristian_ci]

Hi, this mt7601u device attempts continuously to probe spamming the following lines to dmesg output:

[   99.604249] usb 1-2: new high-speed USB device number 7 using xhci_hcd
[   99.758083] usb 1-2: New USB device found, idVendor=148f, idProduct=7601, bcdDevice= 0.00
[   99.758098] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   99.758104] usb 1-2: Product: 802.11 n WLAN
[   99.758109] usb 1-2: Manufacturer: MediaTek
[   99.758114] usb 1-2: SerialNumber: 1.0
[   99.880644] usb 1-2: reset high-speed USB device number 7 using xhci_hcd
[  100.025562] mt7601u 1-2:1.0: ASIC revision: 76010001 MAC revision: 76010500
[  100.029499] mt7601u 1-2:1.0: Firmware Version: 0.1.00 Build: 7640 Build time: 201302052146____
[  100.455461] mt7601u 1-2:1.0: EEPROM ver:0d fae:00
[  100.645586] mt7601u 1-2:1.0: Error: MCU resp urb failed:-71
[  100.645610] mt7601u 1-2:1.0: Error: MCU resp evt:0 seq:5-4!
[  100.645678] mt7601u 1-2:1.0: Error: MCU resp urb failed:-71
[  100.645697] mt7601u 1-2:1.0: Error: MCU resp evt:0 seq:5-4!
[  100.645774] mt7601u 1-2:1.0: Error: MCU resp urb failed:-71
[  100.645816] mt7601u 1-2:1.0: Error: MCU resp evt:0 seq:5-4!
[  100.645920] mt7601u 1-2:1.0: Error: MCU resp urb failed:-71
[  100.645926] mt7601u 1-2:1.0: Error: MCU resp evt:0 seq:5-4!
[  100.646026] mt7601u 1-2:1.0: Error: MCU resp urb failed:-71
[  100.646031] mt7601u 1-2:1.0: Error: MCU resp evt:0 seq:5-4!
[  100.646036] mt7601u 1-2:1.0: Error: mt7601u_mcu_wait_resp timed out
[  100.784270] mt7601u 1-2:1.0: Vendor request req:07 off:0080 failed:-71
[  100.917572] mt7601u 1-2:1.0: Vendor request req:02 off:0080 failed:-71
[  101.057650] mt7601u 1-2:1.0: Vendor request req:02 off:0080 failed:-71
[  101.057737] mt7601u: probe of 1-2:1.0 failed with error -110
[  101.058197] usb 1-2: USB disconnect, device number 7
[  101.313690] usb 1-2: new high-speed USB device number 8 using xhci_hcd

I'm not the only one to have experienced this bug. I've been suggested to report that to kernel mailing list by linux support channels.

I've tested this bug against upstream 6.6.2 kernel tarball from the latest stable branch [1].

To solve this issue. I've also tried to patch mt7601u driver disabling mcu calibration. Which doesn't seem a wise idea because apparently it fixes probing but also hangs completely the machine after some seconds (so, it needs a hard/forced shutdown).

Thanks in advance,

Regards,

Cristian.

[1] https://www.kernel.org/

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Re: [BUG] wireless: mt7601u: probe failed with error -110

[Jakub Kicinski]

On Sat, 25 Nov 2023 13:03:45 +0000 cristian_ci wrote:
> I'm not the only one to have experienced this bug. I've been
> suggested to report that to kernel mailing list by linux support
> channels.
> 
> I've tested this bug against upstream 6.6.2 kernel tarball from the
> latest stable branch [1].
> 
> To solve this issue. I've also tried to patch mt7601u driver
> disabling mcu calibration. Which doesn't seem a wise idea because
> apparently it fixes probing but also hangs completely the machine
> after some seconds (so, it needs a hard/forced shutdown).

Does it work with the vendor driver? The upstream driver is just 
a rewrite of the vendor driver, I don't know much about the device
internals.

Maybe Lorenzo or Felix have some ideas.

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Re: [BUG] wireless: mt7601u: probe failed with error -110

[cristian_ci]

Hi,

On Sunday, November 26th, 2023 at 23:26, Jakub Kicinski <kuba@kernel.org> wrote:

> Does it work with the vendor driver? The upstream driver is just
> a rewrite of the vendor driver, I don't know much about the device
> internals.
> 

I remember I tried the device with the vendor driver [1] (which is not compatible with mainline) and it should work in that case. I noticed there is a datasheet somewhere out around, BTW I've also found information here [2] and here [3] about the driver and devices shipping this chip under several brands.

> Maybe Lorenzo or Felix have some ideas.
Indeed, I dared to fw and cc them in order to join this discussion.

Regards,

Cristian.

[1] https://www.mediatek.com/products/broadband-wifi/mt7601u
[2] http://en.techinfodepot.shoutwiki.com/wiki/Mt7601u
[3] http://en.techinfodepot.shoutwiki.com/wiki/MediaTek_MT7601U

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Re: [BUG] wireless: mt7601u: probe failed with error -110

[cristian_ci]

[RESEND I've made a mistake with list of recipients]

Update:

I've built and installed mt7601Usta vendor driver, which is shown into lsmod output.

ra0 interface appears as shown in the following output from iwconfig and ifconfig:

ra0       Ralink STA  ESSID:""
          Mode:Auto  Frequency=2.412 GHz  Access Point: Not-Associated
          Bit Rate:1 Mb/s
          RTS thr:off   Fragment thr:off
          Link Quality=10/100  Signal level:0 dBm  Noise level:0 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0


ra0       Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisioni:0 txqueuelen:1000
          Byte RX:0 (0.0 B)  Byte TX:0 (0.0 B)

The driver is properly loaded and the device doesn't connect/disconnect continuously as instead happens in mainline driver:

Bus 001 Device 007: ID 148f:7601 Ralink Technology, Corp.
    |__ Port 3: Dev 7, If 0, Class=vend., Driver=rt2870, 480M

Any thoughts?

Waiting for a reply,

Cristian.

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