netdev - [PATCH net-next 1/3] devlink: Update reporter state to error even if recover aborted

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Date:   Sun,  3 Mar 2019 10:57:29 +0200
From:   Eran Ben Elisha <eranbe@...lanox.com>
To:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>
Cc:     Saeed Mahameed <saeedm@...lanox.com>,
        Jiri Pirko <jiri@...lanox.com>,
        Eran Ben Elisha <eranbe@...lanox.com>
Subject: [PATCH net-next 1/3] devlink: Update reporter state to error even if recover aborted

If devlink_health_report() aborted the recover flow due to grace period checker,
it left the reporter status as DEVLINK_HEALTH_REPORTER_STATE_HEALTHY, which is
a bug. Fix that by always setting the reporter state to
DEVLINK_HEALTH_REPORTER_STATE_ERROR prior to running the checker mentioned above.

In addition, save the previous health_state in a temporary variable, then use
it in the abort check comparison instead of using reporter->health_state which
might be already changed.

Fixes: c8e1da0bf923 ("devlink: Add health report functionality")
Signed-off-by: Eran Ben Elisha <eranbe@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
---
 net/core/devlink.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/core/devlink.c b/net/core/devlink.c
index 6515fbec0dcd..376e01a70c6d 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -4569,16 +4569,19 @@ static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
 int devlink_health_report(struct devlink_health_reporter *reporter,
 			  const char *msg, void *priv_ctx)
 {
+	enum devlink_health_reporter_state prev_health_state;
 	struct devlink *devlink = reporter->devlink;
 
 	/* write a log message of the current error */
 	WARN_ON(!msg);
 	trace_devlink_health_report(devlink, reporter->ops->name, msg);
 	reporter->error_count++;
+	prev_health_state = reporter->health_state;
+	reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
 
 	/* abort if the previous error wasn't recovered */
 	if (reporter->auto_recover &&
-	    (reporter->health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
+	    (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
 	     jiffies - reporter->last_recovery_ts <
 	     msecs_to_jiffies(reporter->graceful_period))) {
 		trace_devlink_health_recover_aborted(devlink,
-- 
2.17.1