On Tue, Sep 02, 2025 at 04:35:11PM -0700, Jakub Kicinski wrote:

On Sun, 31 Aug 2025 10:50:35 +0200 Hubert Wiśniewski wrote:

quoted

Trying to bring an AX88772B-based USB-Ethernet adapter up results in a
deadlock if the adapter was suspended at the time. Most network-related
software hangs up indefinitely as a result. This can happen on systems
which configure USB power control to 'auto' by default, e.g. laptops
running `tlp`.

 
Oleksij, this seems to date back to commit e0bffe3e6894 ("net: asix:
ax88772: migrate to phylink"). Taking rtnl_lock in runtime resume
callbacks is known to result in unhappiness :(

Could you check if commit e110bc825897 ("net: usb:
lan78xx: Convert to PHYLINK for improved PHY and MAC management")
isn't similarly flawed?

Yes, sorry for delay answer.  I'll investigate it at Friday.

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