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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 18:50:12 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 18:50:12 +0000 |
| commit | 8665bd53f2f2e27e5511d90428cb3f60e6d0ce15 (patch) | |
| tree | 8d58900dc0ebd4a3011f92c128d2fe45bc7c4bf2 /net/core/net-sysfs.c | |
| parent | Adding debian version 6.7.12-1. (diff) | |
| download | linux-8665bd53f2f2e27e5511d90428cb3f60e6d0ce15.tar.xz linux-8665bd53f2f2e27e5511d90428cb3f60e6d0ce15.zip | |
Merging upstream version 6.8.9.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/core/net-sysfs.c')
| -rw-r--r-- | net/core/net-sysfs.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index fccaa5bac..a09d507c5 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -193,11 +193,22 @@ static ssize_t carrier_show(struct device *dev, struct device_attribute *attr, char *buf) { struct net_device *netdev = to_net_dev(dev); + int ret = -EINVAL; - if (netif_running(netdev)) - return sysfs_emit(buf, fmt_dec, !!netif_carrier_ok(netdev)); + if (!rtnl_trylock()) + return restart_syscall(); - return -EINVAL; + if (netif_running(netdev)) { + /* Synchronize carrier state with link watch, + * see also rtnl_getlink(). + */ + linkwatch_sync_dev(netdev); + + ret = sysfs_emit(buf, fmt_dec, !!netif_carrier_ok(netdev)); + } + rtnl_unlock(); + + return ret; } static DEVICE_ATTR_RW(carrier); |