slip: fix get_stats() method
Use integrated net_device_stats instead of a static one, and make sure
no transient values are feeded. ndo_get_stats() can be called by
concurrent cpus.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/slip.c b/drivers/net/slip.c
index fa434fb..d5a36f5 100644
--- a/drivers/net/slip.c
+++ b/drivers/net/slip.c
@@ -561,36 +561,36 @@
static struct net_device_stats *
sl_get_stats(struct net_device *dev)
{
- static struct net_device_stats stats;
+ struct net_device_stats *stats = &dev->stats;
struct slip *sl = netdev_priv(dev);
+ unsigned long c_rx_dropped = 0;
#ifdef SL_INCLUDE_CSLIP
- struct slcompress *comp;
+ unsigned long c_rx_fifo_errors = 0;
+ unsigned long c_tx_fifo_errors = 0;
+ unsigned long c_collisions = 0;
+ struct slcompress *comp = sl->slcomp;
+
+ if (comp) {
+ c_rx_fifo_errors = comp->sls_i_compressed;
+ c_rx_dropped = comp->sls_i_tossed;
+ c_tx_fifo_errors = comp->sls_o_compressed;
+ c_collisions = comp->sls_o_misses;
+ }
+ stats->rx_fifo_errors = sl->rx_compressed + c_rx_fifo_errors;
+ stats->tx_fifo_errors = sl->tx_compressed + c_tx_fifo_errors;
+ stats->collisions = sl->tx_misses + c_collisions;
#endif
- memset(&stats, 0, sizeof(struct net_device_stats));
-
- stats.rx_packets = sl->rx_packets;
- stats.tx_packets = sl->tx_packets;
- stats.rx_bytes = sl->rx_bytes;
- stats.tx_bytes = sl->tx_bytes;
- stats.rx_dropped = sl->rx_dropped;
- stats.tx_dropped = sl->tx_dropped;
- stats.tx_errors = sl->tx_errors;
- stats.rx_errors = sl->rx_errors;
- stats.rx_over_errors = sl->rx_over_errors;
-#ifdef SL_INCLUDE_CSLIP
- stats.rx_fifo_errors = sl->rx_compressed;
- stats.tx_fifo_errors = sl->tx_compressed;
- stats.collisions = sl->tx_misses;
- comp = sl->slcomp;
- if (comp) {
- stats.rx_fifo_errors += comp->sls_i_compressed;
- stats.rx_dropped += comp->sls_i_tossed;
- stats.tx_fifo_errors += comp->sls_o_compressed;
- stats.collisions += comp->sls_o_misses;
- }
-#endif /* CONFIG_INET */
- return (&stats);
+ stats->rx_packets = sl->rx_packets;
+ stats->tx_packets = sl->tx_packets;
+ stats->rx_bytes = sl->rx_bytes;
+ stats->tx_bytes = sl->tx_bytes;
+ stats->rx_dropped = sl->rx_dropped + c_rx_dropped;
+ stats->tx_dropped = sl->tx_dropped;
+ stats->tx_errors = sl->tx_errors;
+ stats->rx_errors = sl->rx_errors;
+ stats->rx_over_errors = sl->rx_over_errors;
+ return stats;
}
/* Netdevice register callback */