mt7915e in mt7621 - Failed to get patch semaphore

[Janusz Dziedzic]

Hello,

Have mt7915e in my mt7621 router (pandora box/ramips).
After fresh start (disconnect/connect power supply) works correctly.
After reboot seems to always fail with:
Sat Dec 18 08:43:58 2021 kern.info kernel: [   14.552269] mt7621-pci
1e140000.pcie: bus=3 slot=2 irq=25
Sat Dec 18 08:43:58 2021 kern.info kernel: [   14.557823] pci
0000:00:02.0: enabling device (0000 -> 0003)
Sat Dec 18 08:43:58 2021 kern.info kernel: [   14.563499] mt7915e
0000:03:00.0: enabling device (0000 -> 0002)
Sat Dec 18 08:43:58 2021 kern.err kernel: [   35.094270] mt7915e
0000:03:00.0: Message 00000010 (seq 1) timeout
Sat Dec 18 08:43:58 2021 kern.err kernel: [   35.100457] mt7915e
0000:03:00.0: Failed to get patch semaphore
Sat Dec 18 08:43:58 2021 kern.err kernel: [   55.574220] mt7915e
0000:03:00.0: Message 00000010 (seq 2) timeout
Sat Dec 18 08:43:58 2021 kern.err kernel: [   55.580380] mt7915e
0000:03:00.0: Failed to get patch semaphore
Sat Dec 18 08:43:58 2021 kern.warn kernel: [   55.586529] mt7915e:
probe of 0000:03:00.0 failed with error -11


This is lspci output:
02:00.0 Network controller: MEDIATEK Corp. MT7612E 802.11acbgn PCI
Express Wireless Network Adapter
03:00.0 Unclassified device [0002]: MEDIATEK Corp. MT7915E 802.11ax
PCI Express Wireless Network Adapter

Detection works correctly after disconnect/connect power supply.
Any idea what could be wrong - pci controller?
This is with latest master.

I don't see this issue with banana-pi-r64 (arm based board).

BR
Janusz