diff options
| author | Roland Dreier <rolandd@cisco.com> | 2009-09-05 20:23:40 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2009-09-05 20:23:40 -0700 |
| commit | 721d67cdca5b7642b380ca0584de8dceecf6102f (patch) | |
| tree | ff54ae434cca6f6d860504094daa84df645ad4db /drivers/infiniband/ulp/ipoib/ipoib_multicast.c | |
| parent | cd0bcf4cb963a147baf0b79d94c25ba86220f708 (diff) | |
| download | blackbird-op-linux-721d67cdca5b7642b380ca0584de8dceecf6102f.tar.gz blackbird-op-linux-721d67cdca5b7642b380ca0584de8dceecf6102f.zip | |
IPoIB: Drop priv->lock before calling ipoib_send()
IPoIB currently must use irqsave locking for priv->lock, since it is
taken from interrupt context in one path. However, ipoib_send() does
skb_orphan(), and the network stack locking is not IRQ-safe.
Therefore we need to make sure we don't hold priv->lock when calling
ipoib_send() to avoid lockdep warnings (the code was almost certainly
safe in practice, since the only code path that takes priv->lock from
interrupt context would never call into the network stack).
Addresses: http://bugzilla.kernel.org/show_bug.cgi?id=13757
Reported-by: Bart Van Assche <bart.vanassche@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_multicast.c')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c index a0e97532e714..a0825fe451e0 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -720,7 +720,9 @@ out: } } + spin_unlock_irqrestore(&priv->lock, flags); ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); + return; } unlock: |
