Index: head/sys/dev/sfxge/sfxge.c
===================================================================
--- head/sys/dev/sfxge/sfxge.c
+++ head/sys/dev/sfxge/sfxge.c
@@ -95,6 +95,13 @@
 	   &sfxge_tx_ring_entries, 0,
 	   "Maximum number of descriptors in a transmit ring");
 
+#define	SFXGE_PARAM_RESTART_ATTEMPTS	SFXGE_PARAM(restart_attempts)
+static int sfxge_restart_attempts = 3;
+TUNABLE_INT(SFXGE_PARAM_RESTART_ATTEMPTS, &sfxge_restart_attempts);
+SYSCTL_INT(_hw_sfxge, OID_AUTO, restart_attempts, CTLFLAG_RDTUN,
+	   &sfxge_restart_attempts, 0,
+	   "Maximum number of attempts to bring interface up after reset");
+
 #if EFSYS_OPT_MCDI_LOGGING
 #define	SFXGE_PARAM_MCDI_LOGGING	SFXGE_PARAM(mcdi_logging)
 static int sfxge_mcdi_logging = 0;
@@ -994,7 +1001,7 @@
 
 	sfxge_stop(sc);
 	efx_nic_reset(sc->enp);
-	for (attempt = 0; attempt < 3; ++attempt) {
+	for (attempt = 0; attempt < sfxge_restart_attempts; ++attempt) {
 		if ((rc = sfxge_start(sc)) == 0)
 			goto done;