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| author | Michael S. Tsirkin <mst@dev.mellanox.co.il> | 2007-05-02 15:31:12 +0300 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-05-06 21:18:11 -0700 |
| commit | d6ef7d68f6f51c5b9de01c542dab8b90067a9c27 (patch) | |
| tree | 9121e758ef948defe37c7d960bcc422fe37aea0f /drivers | |
| parent | aff9e39d97585486764572ab2f3bf5dfce18c660 (diff) | |
| download | linux-stable-d6ef7d68f6f51c5b9de01c542dab8b90067a9c27.tar.gz linux-stable-d6ef7d68f6f51c5b9de01c542dab8b90067a9c27.tar.bz2 linux-stable-d6ef7d68f6f51c5b9de01c542dab8b90067a9c27.zip | |
IPoIB/cm: Don't crash if remote side uses one QP for both directions
The IPoIB CM spec allows the use of a single connection in both
active->passive and passive->active directions. The current Linux
code uses one connection for both directions, but if another node only
uses one connection for both directions, we oops when we try to look
up the passive connection. Fix by checking that qp_context is
non-NULL before dereferencing it.
Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_cm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c index 76717410660e..1e27930077e6 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c @@ -370,7 +370,7 @@ void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) if (!likely(wr_id & IPOIB_CM_RX_UPDATE_MASK)) { p = wc->qp->qp_context; - if (time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_UPDATE_TIME)) { + if (p && time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_UPDATE_TIME)) { spin_lock_irqsave(&priv->lock, flags); p->jiffies = jiffies; /* Move this entry to list head, but do |