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author | Michal Schmidt <mschmidt@redhat.com> | 2014-01-17 22:47:25 +0400 |
---|---|---|
committer | Roland Dreier <roland@purestorage.com> | 2014-01-23 11:01:05 +0400 |
commit | 437708c44395a11e474fb33b4fd7f29483118e51 (patch) | |
tree | fb796c0dbe0c7cac4ecc69cbcf4be551dbf67b66 /MAINTAINERS | |
parent | 7e22e91102c6b9df7c4ae2168910e19d2bb14cd6 (diff) | |
download | linux-437708c44395a11e474fb33b4fd7f29483118e51.tar.xz |
IPoIB: Report operstate consistently when brought up without a link
After booting without a working link, "ip link" shows:
5: mlx4_ib1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 2044 qdisc pfifo_fast
state DOWN qlen 256
...
7: mlx4_ib1.8003@mlx4_ib1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 2044 qdisc
pfifo_fast state DOWN qlen 256
...
Then after connecting and disconnecting the link, which should result
in exactly the same state as before, it shows:
5: mlx4_ib1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 2044 qdisc pfifo_fast
state DOWN qlen 256
...
7: mlx4_ib1.8003@mlx4_ib1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 2044 qdisc
pfifo_fast state LOWERLAYERDOWN qlen 256
...
Notice the (now correct) LOWERLAYERDOWN operstate shown for the
mlx4_ib1.8003 interface. Ideally the identical state would be shown
right after boot.
The problem is related to the calling of netif_carrier_off() in
network drivers. For a long time it was known that doing
netif_carrier_off() before registering the netdevice would result in
the interface's operstate being shown as UNKNOWN if the device was
brought up without a working link. This problem was fixed in commit
8f4cccbbd92 ('net: Set device operstate at registration time'), but
still there remains the minor inconsistency demonstrated above.
This patch fixes it by moving ipoib's call to netif_carrier_off() into
the .ndo_open method, which is where network drivers ordinarily do it.
With the patch when doing the same test as above, the operstate of
mlx4_ib1.8003 is shown as LOWERLAYERDOWN right after boot.
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Acked-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'MAINTAINERS')
0 files changed, 0 insertions, 0 deletions