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| author | Alexander Schmidt <alexs@linux.vnet.ibm.com> | 2008-08-12 15:46:27 +0200 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2008-08-12 11:34:59 -0700 |
| commit | 129a10fb81309f455eeb444560ec38657d29c46f (patch) | |
| tree | 544d44f33452e74b86a0869d5d5c64a503ba872b | |
| parent | 17c2b53adbf1ebd7a8b6a63e2597199676426dbf (diff) | |
| download | linux-129a10fb81309f455eeb444560ec38657d29c46f.tar.gz linux-129a10fb81309f455eeb444560ec38657d29c46f.tar.bz2 linux-129a10fb81309f455eeb444560ec38657d29c46f.zip | |
IB/ehca: Check idr_find() return value
The idr_find() function may fail when trying to get the QP that is
associated with a CQE, e.g. when a QP has been destroyed between the
generation of a CQE and the poll request for it. In consequence, the
return value of idr_find() must be checked and the CQE must be
discarded when the QP cannot be found.
Signed-off-by: Alexander Schmidt <alexs@linux.vnet.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
| -rw-r--r-- | drivers/infiniband/hw/ehca/ehca_reqs.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_reqs.c b/drivers/infiniband/hw/ehca/ehca_reqs.c index acb8649151e0..cea3eba9c83e 100644 --- a/drivers/infiniband/hw/ehca/ehca_reqs.c +++ b/drivers/infiniband/hw/ehca/ehca_reqs.c @@ -680,8 +680,10 @@ repoll: read_lock(&ehca_qp_idr_lock); my_qp = idr_find(&ehca_qp_idr, cqe->qp_token); - wc->qp = &my_qp->ib_qp; read_unlock(&ehca_qp_idr_lock); + if (!my_qp) + goto repoll; + wc->qp = &my_qp->ib_qp; wc->byte_len = cqe->nr_bytes_transferred; wc->pkey_index = cqe->pkey_index; |