RDMA/core: Fix reported speed and width

[ Upstream commit 28b0865714b315e318ac45c4fc9156f3d4649646 ]

When the returned speed from __ethtool_get_link_ksettings() is
SPEED_UNKNOWN this will lead to reporting a wrong speed and width for
providers that uses ib_get_eth_speed(), fix that by defaulting the
netdev_speed to SPEED_1000 in case the returned value from
__ethtool_get_link_ksettings() is SPEED_UNKNOWN.

Fixes: d41861942fc5 ("IB/core: Add generic function to extract IB speed from netdev")
Link: https://lore.kernel.org/r/20200902124304.170912-1-kamalheib1@gmail.com
Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index d21c86dd27d863ee824da3b792589ad78f717227..01f02b3cb835e36960fa93f61c1a74f3b8b8516b 100644 (file)
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1343,7 +1343,7 @@ int ib_get_eth_speed(struct ib_device *dev, u8 port_num, u8 *speed, u8 *width)
 
        dev_put(netdev);
 
-       if (!rc) {
+       if (!rc && lksettings.base.speed != (u32)SPEED_UNKNOWN) {
                netdev_speed = lksettings.base.speed;
        } else {
                netdev_speed = SPEED_1000;