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| author |   Vladimir Oltean <vladimir.oltean@nxp.com> | 2021-09-17 16:34:32 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-09-19 12:08:37 +0100 |
| commit | cf9579976f724ad517cc15b7caadea728c7e245c (patch) | |
| tree | 09808904ac90eab50601d7087cf5ba768244d2c8 /include | |
| parent | net: dsa: bcm_sf2: Fix array overrun in bcm_sf2_num_active_ports() (diff) | |
| download | linux-dev-cf9579976f724ad517cc15b7caadea728c7e245c.tar.xz linux-dev-cf9579976f724ad517cc15b7caadea728c7e245c.zip | |
net: mdio: introduce a shutdown method to mdio device drivers
MDIO-attached devices might have interrupts and other things that might
need quiesced when we kexec into a new kernel. Things are even more
creepy when those interrupt lines are shared, and in that case it is
absolutely mandatory to disable all interrupt sources.
Moreover, MDIO devices might be DSA switches, and DSA needs its own
shutdown method to unlink from the DSA master, which is a new
requirement that appeared after commit 2f1e8ea726e9 ("net: dsa: link
interfaces with the DSA master to get rid of lockdep warnings").
So introduce a ->shutdown method in the MDIO device driver structure.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mdio.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/mdio.h b/include/linux/mdio.h index ffb787d5ebde..5e6dc38f418e 100644 --- a/include/linux/mdio.h +++ b/include/linux/mdio.h @@ -80,6 +80,9 @@ struct mdio_driver { /* Clears up any memory if needed */ void (*remove)(struct mdio_device *mdiodev); + + /* Quiesces the device on system shutdown, turns off interrupts etc */ + void (*shutdown)(struct mdio_device *mdiodev); }; static inline struct mdio_driver * |