[PATCH net-next] ionic: no transition while stopping

[PATCH net-next] ionic: no transition while stopping

[Shannon Nelson]

Make sure we don't try to transition the fw_status_ready
while we're still in the FW_STOPPING state, else we can
get stuck in limbo waiting on a transition that already
happened.

While we're here we can remove a superfluous check on
the lif pointer.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
---
 drivers/net/ethernet/pensando/ionic/ionic_dev.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index faeedc8db6f4..9d0514cfeb5c 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -202,21 +202,25 @@ int ionic_heartbeat_check(struct ionic *ionic)
 		}
 	}
 
+	dev_dbg(ionic->dev, "fw_status 0x%02x ready %d idev->ready %d last_hb 0x%x state 0x%02lx\n",
+		fw_status, fw_status_ready, idev->fw_status_ready,
+		idev->last_fw_hb, lif->state[0]);
+
 	/* is this a transition? */
-	if (fw_status_ready != idev->fw_status_ready) {
+	if (fw_status_ready != idev->fw_status_ready &&
+	    !test_bit(IONIC_LIF_F_FW_STOPPING, lif->state)) {
 		bool trigger = false;
 
 		idev->fw_status_ready = fw_status_ready;
 
-		if (!fw_status_ready && lif &&
+		if (!fw_status_ready &&
 		    !test_bit(IONIC_LIF_F_FW_RESET, lif->state) &&
 		    !test_and_set_bit(IONIC_LIF_F_FW_STOPPING, lif->state)) {
 			dev_info(ionic->dev, "FW stopped 0x%02x\n", fw_status);
 			trigger = true;
 
-		} else if (fw_status_ready && lif &&
-			   test_bit(IONIC_LIF_F_FW_RESET, lif->state) &&
-			   !test_bit(IONIC_LIF_F_FW_STOPPING, lif->state)) {
+		} else if (fw_status_ready &&
+			   test_bit(IONIC_LIF_F_FW_RESET, lif->state)) {
 			dev_info(ionic->dev, "FW running 0x%02x\n", fw_status);
 			trigger = true;
 		}
-- 
2.17.1

Re: [PATCH net-next] ionic: no transition while stopping

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Fri, 25 Feb 2022 09:16:18 -0800 you wrote:
> Make sure we don't try to transition the fw_status_ready
> while we're still in the FW_STOPPING state, else we can
> get stuck in limbo waiting on a transition that already
> happened.
> 
> While we're here we can remove a superfluous check on
> the lif pointer.
> 
> [...]

Here is the summary with links:
  - [net-next] ionic: no transition while stopping
    https://git.kernel.org/netdev/net-next/c/688a5efe0ced

You are awesome, thank you!
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