net: fix 64 bit counters on 32 bit arches
There is a small possibility that a reader gets incorrect values on 32
bit arches. SNMP applications could catch incorrect counters when a
32bit high part is changed by another stats consumer/provider.
One way to solve this is to add a rtnl_link_stats64 param to all
ndo_get_stats64() methods, and also add such a parameter to
dev_get_stats().
Rule is that we are not allowed to use dev->stats64 as a temporary
storage for 64bit stats, but a caller provided area (usually on stack)
Old drivers (only providing get_stats() method) need no changes.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/usb/gadget/rndis.c b/drivers/usb/gadget/rndis.c
index fb69b01..020fa5a 100644
--- a/drivers/usb/gadget/rndis.c
+++ b/drivers/usb/gadget/rndis.c
@@ -171,6 +171,7 @@
int i, count;
rndis_query_cmplt_type *resp;
struct net_device *net;
+ struct rtnl_link_stats64 temp;
const struct rtnl_link_stats64 *stats;
if (!r) return -ENOMEM;
@@ -194,7 +195,7 @@
resp->InformationBufferOffset = cpu_to_le32 (16);
net = rndis_per_dev_params[configNr].dev;
- stats = dev_get_stats(net);
+ stats = dev_get_stats(net, &temp);
switch (OID) {