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| author |   Arseny Maslennikov <ar@cs.msu.ru> | 2018-09-06 17:51:11 +0300 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2018-09-13 11:47:52 -0400 |
| commit | 9b8b2a323008aedd39a8debb861b825707f01420 (patch) | |
| tree | 42cd9ff568ac75b9d198bdeec1ee9b2a758e7254 /drivers/infiniband/ulp/ipoib/ipoib_main.c | |
| parent | Documentation/ABI: document /sys/class/net/*/dev_port (diff) | |
| download | linux-dev-9b8b2a323008aedd39a8debb861b825707f01420.tar.xz linux-dev-9b8b2a323008aedd39a8debb861b825707f01420.zip | |
IB/ipoib: Use dev_port to expose network interface port numbers
Some InfiniBand network devices have multiple ports on the same PCI
function. This initializes the `dev_port' sysfs field of those
network interfaces with their port number.
Prior to this the kernel erroneously used the `dev_id' sysfs
field of those network interfaces to convey the port number to userspace.
The use of `dev_id' was considered correct until Linux 3.15,
when another field, `dev_port', was defined for this particular
purpose and `dev_id' was reserved for distinguishing stacked ifaces
(e.g: VLANs) with the same hardware address as their parent device.
Similar fixes to net/mlx4_en and many other drivers, which started
exporting this information through `dev_id' before 3.15, were accepted
into the kernel 4 years ago.
See 76a066f2a2a0 (`net/mlx4_en: Expose port number through sysfs').
Signed-off-by: Arseny Maslennikov <ar@cs.msu.ru>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_main.c')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index 2d20de72e67f..a046076670e6 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -1881,6 +1881,8 @@ static int ipoib_parent_init(struct net_device *ndev) sizeof(union ib_gid)); SET_NETDEV_DEV(priv->dev, priv->ca->dev.parent); + priv->dev->dev_port = priv->port - 1; + /* Let's set this one too for backwards compatibility. */ priv->dev->dev_id = priv->port - 1; return 0; |