On Sat, Feb 03, 2018 at 05:41:54PM +0100, Heiner Kallweit wrote:
> This commit forces callers of phy_resume() and phy_suspend() to hold
> mutex phydev->lock. This was done for calls to phy_resume() and
> phy_suspend() in phylib, however there are more callers in network
> drivers. I'd assume that these other calls issue a warning now
> because of the lock not being held.
> So is there something I miss or would this have to be fixed?
Hi Heiner
This is a good point.
Yes, it looks like some fixes are needed. But what exactly?
The phy state machine will suspend and resume the phy is you call
phy_stop() and phy_start() in the MAC suspend and resume functions.
A few examples:
tc35815_suspend(), ravb_suspend() via ravb_close(), sh_eth_suspend()
via sh_eth_close(), fec_suspend(), mpc52xx_fec_of_suspend() via
mpc52xx_fec_close(), ucc_geth_suspend(), etc...
So i suspect those drivers which call phy_suspend()/phy_resume()
should really be modified to call phy_stop()/phy_start().
hns_nic_config_phy_loopback() is just funky, and probably needs the
help of the hns guys to fix.
dsa_slave_suspend() already does a phy_stop(), so the phy_suspend()
can be removed.
The comments in lpc_eth_open() suggest the phy_resume() is needed, so
locks should be added. socfpga_dwmac_resume() seems to be the same.
Andrew
