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| author |   Leon Romanovsky <leonro@nvidia.com> | 2021-08-05 14:02:45 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-08-05 13:31:24 +0100 |
| commit | 23809a726c0d004b9d2474333181f8da07360469 (patch) | |
| tree | c2bf92e3e279561d16cb3b3b97ecc43f868c84fe /drivers/net/netdevsim/dev.c | |
| parent | net: dsa: tag_sja1105: optionally build as module when switch driver is module if PTP is enabled (diff) | |
| download | linux-dev-23809a726c0d004b9d2474333181f8da07360469.tar.xz linux-dev-23809a726c0d004b9d2474333181f8da07360469.zip | |
netdevsim: Forbid devlink reload when adding or deleting ports
In order to remove complexity in devlink core related to
devlink_reload_enable/disable, let's rewrite new_port/del_port
logic to rely on internal to netdevsim lcok.
We should protect only reload_down flow because it destroys nsim_dev,
which is needed for nsim_dev_port_add/nsim_dev_port_del to hold
port_list_lock.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netdevsim/dev.c')
| -rw-r--r-- | drivers/net/netdevsim/dev.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c index d538a39d4225..ff5714209b86 100644 --- a/drivers/net/netdevsim/dev.c +++ b/drivers/net/netdevsim/dev.c @@ -864,16 +864,23 @@ static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, struct netlink_ext_ack *extack) { struct nsim_dev *nsim_dev = devlink_priv(devlink); + struct nsim_bus_dev *nsim_bus_dev; + + nsim_bus_dev = nsim_dev->nsim_bus_dev; + if (!mutex_trylock(&nsim_bus_dev->nsim_bus_reload_lock)) + return -EOPNOTSUPP; if (nsim_dev->dont_allow_reload) { /* For testing purposes, user set debugfs dont_allow_reload * value to true. So forbid it. */ NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes"); + mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); return -EOPNOTSUPP; } nsim_dev_reload_destroy(nsim_dev); + mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); return 0; } |