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| author | Allan Stephens <allan.stephens@windriver.com> | 2011-10-18 20:47:02 +0200 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2011-12-27 17:33:40 +0100 |
| commit | bfec73d7e45cdf570d649a547050295789e1e6fb (patch) | |
| tree | 5dad32b2f41b1c250a60c88fc5f4877253b88d13 /net/tipc/config.c | |
| parent | tipc: Allow run-time alteration of default link settings (diff) | |
| download | linux-bfec73d7e45cdf570d649a547050295789e1e6fb.tar.xz linux-bfec73d7e45cdf570d649a547050295789e1e6fb.zip | |
tipc: Revise comment justifying release of configuration spinlock
Comment-only change to better explain why TIPC's configuration lock is
temporarily released while activating support for network interfaces,
and why the existing activation code doesn't require rework.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'net/tipc/config.c')
| -rw-r--r-- | net/tipc/config.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/net/tipc/config.c b/net/tipc/config.c index b25a396b7e1e..4785bf26cdf4 100644 --- a/net/tipc/config.c +++ b/net/tipc/config.c @@ -184,13 +184,12 @@ static struct sk_buff *cfg_set_own_addr(void) " (cannot change node address once assigned)"); /* - * Must release all spinlocks before calling start_net() because - * Linux version of TIPC calls eth_media_start() which calls - * register_netdevice_notifier() which may block! - * - * Temporarily releasing the lock should be harmless for non-Linux TIPC, - * but Linux version of eth_media_start() should really be reworked - * so that it can be called with spinlocks held. + * Must temporarily release configuration spinlock while switching into + * networking mode as it calls tipc_eth_media_start(), which may sleep. + * Releasing the lock is harmless as other locally-issued configuration + * commands won't occur until this one completes, and remotely-issued + * configuration commands can't be received until a local configuration + * command to enable the first bearer is received and processed. */ spin_unlock_bh(&config_lock); |