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| author | Wolfram Sang <wsa@the-dreams.de> | 2018-03-24 13:39:18 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2018-03-24 13:39:18 +0100 |
| commit | 0b884c22c5b7f6ef985b3d39fed06ad1f8296042 (patch) | |
| tree | 74504e80ad62cb0acabdfa796348d001d5d1a2a4 /net/core/dev.c | |
| parent | eb49778c8c6cbe075cf90d741ccf16f674a8db4e (diff) | |
| parent | 84e10623c0b9c81557918804f309d66aec86a233 (diff) | |
| download | linux-0b884c22c5b7f6ef985b3d39fed06ad1f8296042.tar.gz linux-0b884c22c5b7f6ef985b3d39fed06ad1f8296042.tar.xz | |
Merge tag 'at24-4.17-updates-for-wolfram' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into i2c/for-4.17
"three new special cases for device tree compatible strings"
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index d4362befe7e2..2cedf520cb28 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6396,6 +6396,7 @@ static int __netdev_upper_dev_link(struct net_device *dev, .linking = true, .upper_info = upper_info, }; + struct net_device *master_dev; int ret = 0; ASSERT_RTNL(); @@ -6407,11 +6408,14 @@ static int __netdev_upper_dev_link(struct net_device *dev, if (netdev_has_upper_dev(upper_dev, dev)) return -EBUSY; - if (netdev_has_upper_dev(dev, upper_dev)) - return -EEXIST; - - if (master && netdev_master_upper_dev_get(dev)) - return -EBUSY; + if (!master) { + if (netdev_has_upper_dev(dev, upper_dev)) + return -EEXIST; + } else { + master_dev = netdev_master_upper_dev_get(dev); + if (master_dev) + return master_dev == upper_dev ? -EEXIST : -EBUSY; + } ret = call_netdevice_notifiers_info(NETDEV_PRECHANGEUPPER, &changeupper_info.info); |