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tipc: remove dev_base_lock use from enable_bearer 

Convert enable_bearer() to RCU locking with dev_get_by_name().

Based on a similar changeset in commit 840a185d ["aoe: remove
dev_base_lock use from aoecmd_cfg_pkts()"] -- quoting that:

  "dev_base_lock is the legacy way to lock the device list,
   and is planned to disappear. (writers hold RTNL, readers
   hold RCU lock)"

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ying Xue 2013-06-17 10:54:51 -04:00 committed by David S. Miller
parent 126c052464
commit 2537af9dca
2 changed files with 4 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
net/tipc/eth_media.c
View File

@ -162,8 +162,7 @@ static void setup_bearer(struct work_struct *work)
*/
static int enable_bearer(struct tipc_bearer *tb_ptr)
{
struct net_device *dev = NULL;
struct net_device *pdev = NULL;
struct net_device *dev;
struct eth_bearer *eb_ptr = &eth_bearers[0];
struct eth_bearer *stop = &eth_bearers[MAX_ETH_BEARERS];
char *driver_name = strchr((const char *)tb_ptr->name, ':') + 1;
@ -178,15 +177,7 @@ static int enable_bearer(struct tipc_bearer *tb_ptr)
}
/* Find device with specified name */
read_lock(&dev_base_lock);
for_each_netdev(&init_net, pdev) {
if (!strncmp(pdev->name, driver_name, IFNAMSIZ)) {
dev = pdev;
dev_hold(dev);
break;
}
}
read_unlock(&dev_base_lock);
dev = dev_get_by_name(&init_net, driver_name);
if (!dev)
return -ENODEV;

13
net/tipc/ib_media.c
View File

@ -155,8 +155,7 @@ static void setup_bearer(struct work_struct *work)
*/
static int enable_bearer(struct tipc_bearer *tb_ptr)
{
struct net_device *dev = NULL;
struct net_device *pdev = NULL;
struct net_device *dev;
struct ib_bearer *ib_ptr = &ib_bearers[0];
struct ib_bearer *stop = &ib_bearers[MAX_IB_BEARERS];
char *driver_name = strchr((const char *)tb_ptr->name, ':') + 1;
@ -171,15 +170,7 @@ static int enable_bearer(struct tipc_bearer *tb_ptr)
}
/* Find device with specified name */
read_lock(&dev_base_lock);
for_each_netdev(&init_net, pdev) {
if (!strncmp(pdev->name, driver_name, IFNAMSIZ)) {
dev = pdev;
dev_hold(dev);
break;
}
}
read_unlock(&dev_base_lock);
dev = dev_get_by_name(&init_net, driver_name);
if (!dev)
return -ENODEV;