From df8aeaa8268f11dc3c2d0975954624cf324eab15 Mon Sep 17 00:00:00 2001 From: Shannon Nelson Date: Wed, 30 Sep 2020 10:48:27 -0700 Subject: ionic: stop watchdog timer earlier on remove We need to be better at making sure we don't have a link check watchdog go off while we're shutting things down, so let's stop the timer as soon as we start the remove. Meanwhile, since that was the only thing in ionic_dev_teardown(), simplify and remove that function. Signed-off-by: Shannon Nelson Signed-off-by: David S. Miller --- drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c | 5 +++-- drivers/net/ethernet/pensando/ionic/ionic_dev.c | 5 ----- drivers/net/ethernet/pensando/ionic/ionic_dev.h | 1 - 3 files changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c index d1d6fb6669e5..2749ce009ebc 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c @@ -350,7 +350,7 @@ err_out_port_reset: err_out_reset: ionic_reset(ionic); err_out_teardown: - ionic_dev_teardown(ionic); + del_timer_sync(&ionic->watchdog_timer); pci_clear_master(pdev); /* Don't fail the probe for these errors, keep * the hw interface around for inspection @@ -378,6 +378,8 @@ static void ionic_remove(struct pci_dev *pdev) if (!ionic) return; + del_timer_sync(&ionic->watchdog_timer); + if (ionic->lif) { ionic_devlink_unregister(ionic); ionic_lif_unregister(ionic->lif); @@ -389,7 +391,6 @@ static void ionic_remove(struct pci_dev *pdev) ionic_port_reset(ionic); ionic_reset(ionic); - ionic_dev_teardown(ionic); pci_clear_master(pdev); ionic_unmap_bars(ionic); pci_release_regions(pdev); diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c index a02f710200da..16b6b65e8319 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c @@ -98,11 +98,6 @@ int ionic_dev_setup(struct ionic *ionic) return 0; } -void ionic_dev_teardown(struct ionic *ionic) -{ - del_timer_sync(&ionic->watchdog_timer); -} - /* Devcmd Interface */ int ionic_heartbeat_check(struct ionic *ionic) { diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h index 8842dc4a716f..c109cd5a0471 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h +++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h @@ -283,7 +283,6 @@ static inline bool ionic_q_has_space(struct ionic_queue *q, unsigned int want) void ionic_init_devinfo(struct ionic *ionic); int ionic_dev_setup(struct ionic *ionic); -void ionic_dev_teardown(struct ionic *ionic); void ionic_dev_cmd_go(struct ionic_dev *idev, union ionic_dev_cmd *cmd); u8 ionic_dev_cmd_status(struct ionic_dev *idev); -- cgit From 0816e0c8188e7db85a7284d3f0f456947ebb049c Mon Sep 17 00:00:00 2001 From: Shannon Nelson Date: Wed, 30 Sep 2020 10:48:28 -0700 Subject: 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 Signed-off-by: David S. Miller --- 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 16b6b65e8319..545c99b15df8 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, false); } -- cgit