bond_miimon_commit() handles the UP transition for each slave of a bond
in the case of MII. It is triggered 10 times per second for the default
MII Polling interval of 100ms. For device drivers that do not implement
__ethtool_get_link_ksettings() the call to bond_update_speed_duplex()
fails persistently while the MII status could remain UP. That is, in this and
other cases where the speed/duplex update keeps failing over a longer
period of time while the MII state is UP, a warning is printed every MII
polling interval.

To address these excessive warnings pr_warn_ratelimited() should be used
instead. pr_warn_once() would not be sufficient since the call to
bond_update_speed_duplex() could recover to meanwhile succeed and fail
again later.

Fixes: b5bf0f5b16b9c (bonding: correctly update link status during mii-commit 
phase)
Signed-off-by: Andreas Born <futur.a...@googlemail.com>
---
 drivers/net/bonding/bond_main.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 85bb272d2a34..7b8bbee531d7 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2144,9 +2144,9 @@ static void bond_miimon_commit(struct bonding *bond)
                        if (bond_update_speed_duplex(slave) &&
                            bond_needs_speed_duplex(bond)) {
                                slave->link = BOND_LINK_DOWN;
-                               netdev_warn(bond->dev,
-                                           "failed to get link speed/duplex 
for %s\n",
-                                           slave->dev->name);
+                               pr_warn_ratelimited("%s: failed to get link 
speed/duplex for %s\n",
+                                                   bond->dev->name,
+                                                   slave->dev->name);
                                continue;
                        }
                        bond_set_slave_link_state(slave, BOND_LINK_UP,
-- 
2.14.0

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