netif_set_real_num_tx/rx_queues() 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_resume()
|- cpsw_ndo_open()
|- netif_set_real_num_tx/rx_queues()
|- ASSERT_RTNL();
Hence, fix it by surrounding cpsw_ndo_open() by rtnl_lock/unlock() calls.
Cc: Dave Gerlach <d-gerlach@xxxxxx>
Cc: Ivan Khoronzhuk <ivan.khoronzhuk@xxxxxxxxxx>
Fixes: commit e05107e6b747 ("net: ethernet: ti: cpsw: add multi queue support")
Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
---
drivers/net/ethernet/ti/cpsw.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index ae1ec6a..fd6c03b 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -2944,6 +2944,8 @@ static int cpsw_resume(struct device *dev)
/* Select default pin state */
pinctrl_pm_select_default_state(dev);
+ /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
+ rtnl_lock();
if (cpsw->data.dual_emac) {
int i;
@@ -2955,6 +2957,8 @@ static int cpsw_resume(struct device *dev)
if (netif_running(ndev))
cpsw_ndo_open(ndev);
}
+ rtnl_unlock();
+
return 0;
}
#endif
--
2.10.1
--
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