mt7921e: repeated driver own failures cause hanging

[moosager90 <moosager90@gmail.com>]

Hello,

There is an issue with mt7921e which causes repeated failures in chip resets,
bringing the network down and causing hanging on every command or action on the
system; the only workaround is to reboot. This is what the kernel output looks
like at those times:

mt7921e 0000:62:00.0: driver own failed
kernel: mt7921e 0000:62:00.0: Timeout for driver own
kernel: mt7921e 0000:62:00.0: driver own failed
kernel: mt7921e 0000:62:00.0: Timeout for driver own
kernel: mt7921e 0000:62:00.0: driver own failed
kernel: mt7921e 0000:62:00.0: Timeout for driver own
kernel: mt7921e 0000:62:00.0: driver own failed
kernel: mt7921e 0000:62:00.0: chip reset failed
kernel: mt7921e 0000:62:00.0: Timeout for driver own
kernel: Console: switching to colour frame buffer device 360x112
kernel: fbcon: Taking over console
kernel: mt7921e 0000:62:00.0: Message 00020001 (seq 1) timeout

I have observed the issue on many untainted kernels, and I have had it happen on
vanilla kernels not provided by my distro as well.

Mine and some other people's reports are available at [1]. More logs of the
issue on my system are in the attachments of my original report on the Red Hat
Bugzilla [2].

In the past, the issue was reported at [3], which resulted in a patch [4] that
only keeps the system running instead of panicking. This means the driver still
causes system hangs.

I still don't know the root cause of the issue and I would like to get to the
bottom of this; any help or guidance is appreciated. Crucially, I have not found
a way to reproduce the issue at will.

Best regards.

[1] https://bugzilla.kernel.org/show_bug.cgi?id=220353
[2] https://bugzilla.redhat.com/show_bug.cgi?id=2411854
[3] https://lore.kernel.org/linux-wireless/VE1PR04MB64945C660A81D38F290E4A4BE59F9@VE1PR04MB6494.eurprd04.prod.outlook.com/T/#u
[4] https://patchwork.kernel.org/project/linux-wireless/patch/727eb5ffd3c7c805245e512da150ecf0a7154020.1659452909.git.deren.wu@mediatek.com/