IPoIB/cm: Fix SRQ WR leak

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SRQ WR leakage has been observed with IPoIB/CM: e.g. flipping ports on
and off will, with time, leak out all WRs and then all connections
will start getting RNR NAKs.  Fix this in the way suggested by spec:
move the QP being destroyed to the error state, wait for "Last WQE
Reached" event and then post WR on a "drain QP" connected to the same
CQ.  Once we observe a completion on the drain QP, it's safe to call
ib_destroy_qp.

Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

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Michael S. Tsirkin 2007-05-21 15:04:59 +03:00 • committed by Roland Dreier

parent 24bd1e4e32

commit 518b1646f8

3 changed files with 211 additions and 36 deletions

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42

drivers/infiniband/ulp/ipoib/ipoib.h

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203

drivers/infiniband/ulp/ipoib/ipoib_cm.c

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2

drivers/infiniband/ulp/ipoib/ipoib_verbs.c

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