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From: Andrew Rybchenko <arybchik@FreeBSD.org>
Date: Fri, 11 Dec 2015 06:20:31 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r292086 - head/sys/dev/sfxge
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Author: arybchik
Date: Fri Dec 11 06:20:31 2015
New Revision: 292086
URL: https://svnweb.freebsd.org/changeset/base/292086

Log:
  sfxge: add tunable for maximum start attetmps after reset
  
  Reviewed by:    gnn
  Sponsored by:   Solarflare Communications, Inc.
  MFC after:      2 days
  Differential Revision: https://reviews.freebsd.org/D2610

Modified:
  head/sys/dev/sfxge/sfxge.c

Modified: head/sys/dev/sfxge/sfxge.c
==============================================================================
--- head/sys/dev/sfxge/sfxge.c	Fri Dec 11 05:39:45 2015	(r292085)
+++ head/sys/dev/sfxge/sfxge.c	Fri Dec 11 06:20:31 2015	(r292086)
@@ -95,6 +95,13 @@ SYSCTL_INT(_hw_sfxge, OID_AUTO, tx_ring,
 	   &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_reset(void *arg, int npending)
 
 	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;