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

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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>
This commit is contained in:
WingMan Kwok 2015-07-23 15:57:19 -04:00 committed by David S. Miller
parent ea6f82fe37
commit c0f54edbe2
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ethernet/ti/netcp_ethss.c
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@ -2189,14 +2189,15 @@ static void netcp_ethss_timer(unsigned long arg)
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);