netdev - [PATCH net-next 1/4] ionic: catch transition back to RUNNING with fw

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Date:   Thu, 17 Feb 2022 14:02:49 -0800
From:   Shannon Nelson <snelson@...sando.io>
To:     davem@...emloft.net, netdev@...r.kernel.org, kuba@...nel.org
Cc:     drivers@...sando.io, Shannon Nelson <snelson@...sando.io>
Subject: [PATCH net-next 1/4] ionic: catch transition back to RUNNING with fw_generation 0

In some graceful updates that get initially triggered by the
RESET event, especially with older firmware, the fw_generation
bits don't change but the fw_status is seen to go to 0 then back
to 1.  However, the driver didn't perform the restart, remained
waiting for fw_generation to change, and got left in limbo.

This is because the clearing of idev->fw_status_ready to 0
didn't happen correctly as it was buried in the transition
trigger: since the transition down was triggered not here
but in the RESET event handler, the clear to 0 didn't happen,
so the transition back to 1 wasn't detected.

Fix this particular case by bringing the setting of
idev->fw_status_ready back out to where it was before.

Fixes: 398d1e37f960 ("ionic: add FW_STOPPING state")
Signed-off-by: Shannon Nelson <snelson@...sando.io>
---
 drivers/net/ethernet/pensando/ionic/ionic_dev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 52a1b5cfd8e7..faeedc8db6f4 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -206,6 +206,8 @@ int ionic_heartbeat_check(struct ionic *ionic)
 	if (fw_status_ready != idev->fw_status_ready) {
 		bool trigger = false;

+		idev->fw_status_ready = fw_status_ready;
+
 		if (!fw_status_ready && lif &&
 		    !test_bit(IONIC_LIF_F_FW_RESET, lif->state) &&
 		    !test_and_set_bit(IONIC_LIF_F_FW_STOPPING, lif->state)) {
@@ -222,8 +224,6 @@ int ionic_heartbeat_check(struct ionic *ionic)
 		if (trigger) {
 			struct ionic_deferred_work *work;

-			idev->fw_status_ready = fw_status_ready;
-
 			work = kzalloc(sizeof(*work), GFP_ATOMIC);
 			if (work) {
 				work->type = IONIC_DW_TYPE_LIF_RESET;
-- 
2.17.1