diff options
| author | Shannon Nelson <snelson@pensando.io> | 2020-06-09 05:41:43 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-09 22:19:27 +0200 |
| commit | 976ee3b21119dcf5c6d96233d688a1453f29fa83 (patch) | |
| tree | 5bb4fc79ffbe96eb585f120f6ac659836d167645 /drivers | |
| parent | net: sched: export __netdev_watchdog_up() (diff) | |
| download | linux-976ee3b21119dcf5c6d96233d688a1453f29fa83.tar.xz linux-976ee3b21119dcf5c6d96233d688a1453f29fa83.zip | |
ionic: wait on queue start until after IFF_UP
The netif_running() test looks at __LINK_STATE_START which
gets set before ndo_open() is called, there is a window of
time between that and when the queues are actually ready to
be run. If ionic_check_link_status() notices that the link is
up very soon after netif_running() becomes true, it might try
to run the queues before they are ready, causing all manner of
potential issues. Since the netdev->flags IFF_UP isn't set
until after ndo_open() returns, we can wait for that before
we allow ionic_check_link_status() to start the queues.
On the way back to close, __LINK_STATE_START is cleared before
calling ndo_stop(), and IFF_UP is cleared after. Both of
these need to be true in order to safely stop the queues
from ionic_check_link_status().
Fixes: 49d3b493673a ("ionic: disable the queues on link down")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/pensando/ionic/ionic_lif.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 7321a92f8395..fbc36e9e4729 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -116,7 +116,7 @@ static void ionic_link_status_check(struct ionic_lif *lif) netif_carrier_on(netdev); } - if (netif_running(lif->netdev)) + if (lif->netdev->flags & IFF_UP && netif_running(lif->netdev)) ionic_start_queues(lif); } else { if (netif_carrier_ok(netdev)) { @@ -124,7 +124,7 @@ static void ionic_link_status_check(struct ionic_lif *lif) netif_carrier_off(netdev); } - if (netif_running(lif->netdev)) + if (lif->netdev->flags & IFF_UP && netif_running(lif->netdev)) ionic_stop_queues(lif); } |