net/bnxt: fix health check alarm cancellation

[ upstream commit d723d1f ]

Driver cancels the health check alarm only if error recovery is enabled
in the FW. This can cause an issue. There is a small window where the
driver receives the async event from FW and port close is invoked
immediately. Driver clears BNXT_FLAG_RECOVERY_ENABLED flag when it gets
the async event from FW. As a result, the health check alarm will not
get canceled during port close and causes a segfault when the alarm tries
to read Heartbeat register.

Fix this by canceling the health check alarm unconditionally during
port stop.

Fixes: 9d0cbae ("net/bnxt: support periodic FW health monitoring")

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

drivers/net/bnxt/bnxt_ethdev.c

@@ -4080,9 +4080,6 @@ void bnxt_schedule_fw_health_check(struct bnxt *bp)
 
 static void bnxt_cancel_fw_health_check(struct bnxt *bp)
 {
-	if (!bnxt_is_recovery_enabled(bp))
-		return;
-
 	rte_eal_alarm_cancel(bnxt_check_fw_health, (void *)bp);
 	bp->flags &= ~BNXT_FLAG_FW_HEALTH_CHECK_SCHEDULED;
 }