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bridge: add missing bridge port check for offloads 

This patch fixes a missing bridge port check caught by smatch.

setlink/dellink of attributes like vlans can come for a bridge device
and there is no need to offload those today. So, this patch adds a bridge
port check. (In these cases however, the BRIDGE_SELF flags will always be set
and we may not hit a problem with the current code).

smatch complaint:

The patch 68e331c785b8: "bridge: offload bridge port attributes to
switch asic if feature flag set" from Jan 29, 2015, leads to the
following Smatch complaint:

net/bridge/br_netlink.c:552 br_setlink()
	 error: we previously assumed 'p' could be null (see line 518)

net/bridge/br_netlink.c
   517
   518		if (p && protinfo) {
                    ^
Check for NULL.

Reported-By: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu 2015-02-05 22:24:45 -08:00 committed by David S. Miller
parent d78f802f18
commit 1fd0bddb61
1 changed files with 2 additions and 2 deletions
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4
net/bridge/br_netlink.c
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@ -543,7 +543,7 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
afspec, RTM_SETLINK);
}
if (!(flags & BRIDGE_FLAGS_SELF)) {
if (p && !(flags & BRIDGE_FLAGS_SELF)) {
/* set bridge attributes in hardware if supported
*/
ret_offload = netdev_switch_port_bridge_setlink(dev, nlh,
@ -583,7 +583,7 @@ int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
*/
br_ifinfo_notify(RTM_NEWLINK, p);
if (!(flags & BRIDGE_FLAGS_SELF)) {
if (p && !(flags & BRIDGE_FLAGS_SELF)) {
/* del bridge attributes in hardware
*/
ret_offload = netdev_switch_port_bridge_dellink(dev, nlh,