Re: [PATCH net] net: phy: mscc: fix deadlock in phy_ethtool_{get,set}_wol()

[Vladimir Oltean]

On Tue, Mar 14, 2023 at 05:31:45PM +0100, Andrew Lunn wrote:
> [Goes and checks to see if the same problem exists for other PHY drivers]

Here's a call path I am not sure how to interpret (but doesn't look like
there's anything preventing it).

linkstate_get_sqi()
-> mutex_lock(&phydev->lock)
   -> phydev->drv->get_sqi(phydev);
      -> lan87xx_get_sqi()
         -> access_ereg()
            -> lan937x_dsp_workaround()
               -> mutex_lock(&phydev->lock);
               -> mutex_unlock(&phydev->lock);
-> mutex_unlock(&phydev->lock)