| Message ID | 20201115074210.23605-1-vee.khee.wong@intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2,net,1/1] net: stmmac: Use rtnl_lock/unlock on netif_set_real_num_rx_queues() call | expand |
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index ba855465a2db..c8770e9668a1 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -5272,6 +5272,7 @@ int stmmac_resume(struct device *dev) return ret; } + rtnl_lock(); mutex_lock(&priv->lock); stmmac_reset_queues_param(priv); @@ -5287,6 +5288,7 @@ int stmmac_resume(struct device *dev) stmmac_enable_all_queues(priv); mutex_unlock(&priv->lock); + rtnl_unlock(); if (!device_may_wakeup(priv->device) || !priv->plat->pmt) { rtnl_lock();
Fix an issue where dump stack is printed on suspend resume flow due to netif_set_real_num_rx_queues() is not called with rtnl_lock held(). Fixes: 686cff3d7022 ("net: stmmac: Fix incorrect location to set real_num_rx|tx_queues") Reported-by: Christophe ROULLIER <christophe.roullier@st.com> Tested-by: Christophe ROULLIER <christophe.roullier@st.com> Cc: Alexandre TORGUE <alexandre.torgue@st.com> Reviewed-by: Ong Boon Leong <boon.leong.ong@intel.com> Signed-off-by: Wong Vee Khee <vee.khee.wong@intel.com> --- v2 changelog: - Move rtnl_lock() before priv->lock and release it after to avoid a possible ABBA deadlock scenario. --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 ++ 1 file changed, 2 insertions(+)