[PATCH 3.10 09/54] net: mv643xx_eth: update statistics timer from timer context only

Greg Kroah-Hartman
2013-11-01T22:38:57Z

From: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

[ Upstream commit 041b4ddb84989f06ff1df0ca869b950f1ee3cb1c ]

Each port driver installs a periodic timer to update port statistics
by calling mib_counters_update. As mib_counters_update is also called
from non-timer context, we should not reschedule the timer there but
rather move it to timer-only context.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/marvell/mv643xx_eth.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -1125,15 +1125,13 @@ static void mib_counters_update(struct m
p->rx_discard += rdlp(mp, RX_DISCARD_FRAME_CNT);
p->rx_overrun += rdlp(mp, RX_OVERRUN_FRAME_CNT);
spin_unlock_bh(&mp->mib_counters_lock);
-
- mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
}

static void mib_counters_timer_wrapper(unsigned long _mp)
{
struct mv643xx_eth_private *mp = (void *)_mp;
-
mib_counters_update(mp);
+ mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
}