From: Grygorii Strashko <grygorii.strashko@ti.com>
Date: Fri, 22 May 2020 20:09:28 +0300
Subject: net: ethernet: ti: cpsw: fix ASSERT_RTNL() warning during suspend
Git-commit: 4c64b83d03f4aafcdf710caad994cbc855802e74
Patch-mainline: 5.7-rc7
References: networking-stable-20_05_27
vlan_for_each() are required to be called with rtnl_lock taken, otherwise
ASSERT_RTNL() warning will be triggered - which happens now during System
resume from suspend:
cpsw_suspend()
|- cpsw_ndo_stop()
|- __hw_addr_ref_unsync_dev()
|- cpsw_purge_all_mc()
|- vlan_for_each()
|- ASSERT_RTNL();
Hence, fix it by surrounding cpsw_ndo_stop() by rtnl_lock/unlock() calls.
Fixes: 15180eca569b ("net: ethernet: ti: cpsw: fix vlan mcast")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/net/ethernet/ti/cpsw.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -3000,11 +3000,15 @@ static int cpsw_suspend(struct device *d
struct cpsw_common *cpsw = dev_get_drvdata(dev);
int i;
+ rtnl_lock();
+
for (i = 0; i < cpsw->data.slaves; i++)
if (cpsw->slaves[i].ndev)
if (netif_running(cpsw->slaves[i].ndev))
cpsw_ndo_stop(cpsw->slaves[i].ndev);
+ rtnl_unlock();
+
/* Select sleep pin state */
pinctrl_pm_select_sleep_state(dev);