commit c0f54edbe26fbe8194d7e72c24c49f7b1c9c547f
author WingMan Kwok <w-kwok2@ti.com> Thu Jul 23 15:57:19 2015 -0400
committer David S. Miller <davem@davemloft.net> Mon Jul 27 00:18:39 2015 -0700
tree 89277ca84708901c3855ff62e53df7c293fd0d87
parent ea6f82fe37319675e271dd6b55fb37731eef0e46

net: netcp: Fixes the use of spin_lock_bh in timer function

This patch fixes a bug in which the timer routine synchronized
against the ethtool-triggered statistics updates with spin_lock_bh().
A timer function is itself a bottom-half, so this should be
spin_lock().

Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/netcp_ethss.c

diff --git a/drivers/net/ethernet/ti/netcp_ethss.c b/drivers/net/ethernet/ti/netcp_ethss.c
index 9b7e0a3..cabf977 100644
--- a/drivers/net/ethernet/ti/netcp_ethss.c
+++ b/drivers/net/ethernet/ti/netcp_ethss.c
@@ -2189,14 +2189,15 @@
 		netcp_ethss_update_link_state(gbe_dev, slave, NULL);
 	}
 
-	spin_lock_bh(&gbe_dev->hw_stats_lock);
+	/* A timer runs as a BH, no need to block them */
+	spin_lock(&gbe_dev->hw_stats_lock);
 
 	if (gbe_dev->ss_version == GBE_SS_VERSION_14)
 		gbe_update_stats_ver14(gbe_dev, NULL);
 	else
 		gbe_update_stats(gbe_dev, NULL);
 
-	spin_unlock_bh(&gbe_dev->hw_stats_lock);
+	spin_unlock(&gbe_dev->hw_stats_lock);
 
 	gbe_dev->timer.expires	= jiffies + GBE_TIMER_INTERVAL;
 	add_timer(&gbe_dev->timer);