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Message-Id: <20200929221956.3521-3-snelson@pensando.io> Date: Tue, 29 Sep 2020 15:19:56 -0700 From: Shannon Nelson <snelson@...sando.io> To: netdev@...r.kernel.org, davem@...emloft.net Cc: Shannon Nelson <snelson@...sando.io> Subject: [PATCH net-next 2/2] ionic: prevent early watchdog check In one corner case scenario, the driver device lif setup can get delayed such that the ionic_watchdog_cb() timer goes off before the ionic->lif is set, thus causing a NULL pointer panic. We catch the problem by checking for a NULL lif just a little earlier in the callback. Signed-off-by: Shannon Nelson <snelson@...sando.io> --- drivers/net/ethernet/pensando/ionic/ionic_dev.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c index 306e9401b09b..f90322ec3e18 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c @@ -19,9 +19,12 @@ static void ionic_watchdog_cb(struct timer_list *t) mod_timer(&ionic->watchdog_timer, round_jiffies(jiffies + ionic->watchdog_period)); + if (!ionic->lif) + return; + hb = ionic_heartbeat_check(ionic); - if (hb >= 0 && ionic->lif) + if (hb >= 0) ionic_link_status_check_request(ionic->lif); } -- 2.17.1
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