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>
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@ -680,8 +680,10 @@ repoll:
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read_lock(&ehca_qp_idr_lock);
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read_lock(&ehca_qp_idr_lock);
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my_qp = idr_find(&ehca_qp_idr, cqe->qp_token);
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my_qp = idr_find(&ehca_qp_idr, cqe->qp_token);
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wc->qp = &my_qp->ib_qp;
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read_unlock(&ehca_qp_idr_lock);
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read_unlock(&ehca_qp_idr_lock);
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if (!my_qp)
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goto repoll;
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wc->qp = &my_qp->ib_qp;
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wc->byte_len = cqe->nr_bytes_transferred;
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wc->byte_len = cqe->nr_bytes_transferred;
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wc->pkey_index = cqe->pkey_index;
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wc->pkey_index = cqe->pkey_index;
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