[PATCH net-next] net: dsa: motorcomm: Stop MIB poll on link down

[David Yang <mmyangfl@gmail.com>]

The poll re-arms itself unconditionally, and link down only cancels the
work non-sync, so a poll caught running kept polling every few seconds
while the link was down.

Cancel the work synchronously so that the re-arm from a running poll is
rejected.

Not carrying a fix tag - the existing behavior is harmless nevertheless.

Signed-off-by: David Yang <mmyangfl@gmail.com>
---
 drivers/net/dsa/motorcomm/chip.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/dsa/motorcomm/chip.c b/drivers/net/dsa/motorcomm/chip.c
index 33e5fc127244..758599ba0957 100644
--- a/drivers/net/dsa/motorcomm/chip.c
+++ b/drivers/net/dsa/motorcomm/chip.c
@@ -1837,10 +1837,9 @@ yt921x_phylink_mac_link_down(struct phylink_config *config, unsigned int mode,
 	int port = dp->index;
 	int res;
 
-	/* No need to sync; port control block is hold until device remove */
 	pm = priv->ports[port].mib;
 	if (pm)
-		cancel_delayed_work(&pm->work);
+		cancel_delayed_work_sync(&pm->work);
 
 	mutex_lock(&priv->reg_lock);
 	res = yt921x_port_down(priv, port);
-- 
2.53.0