[PATCH net-next 16/16] tipc: remove dev_base_lock use from enable_bearer
From: Paul Gortmaker <hidden>
Date: 2013-06-17 14:55:24
Subsystem:
networking [general], the rest, tipc network layer · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Jon Maloy
From: Ying Xue <redacted> 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 <redacted> Signed-off-by: Paul Gortmaker <redacted> --- net/tipc/eth_media.c | 13 ++----------- net/tipc/ib_media.c | 13 ++----------- 2 files changed, 4 insertions(+), 22 deletions(-)
diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index c1aa37f..40ea40c 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c@@ -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 = ð_bearers[0]; struct eth_bearer *stop = ð_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;
diff --git a/net/tipc/ib_media.c b/net/tipc/ib_media.c
index baa9df4..ad2e1ec 100644
--- a/net/tipc/ib_media.c
+++ b/net/tipc/ib_media.c@@ -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;
--
1.8.1.2