[IB/mthca]: Fix error CQ entry handling on mem-free HCAs
Fix handling of error CQ entries on mem-free HCAs: the doorbell count is never valid so we shouldn't look at it. This fixes problems exposed by new HCA firmware. Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -373,8 +373,12 @@ static int handle_error_cqe(struct mthca_dev *dev, struct mthca_cq *cq,
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* If we're at the end of the WQE chain, or we've used up our
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* If we're at the end of the WQE chain, or we've used up our
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* doorbell count, free the CQE. Otherwise just update it for
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* doorbell count, free the CQE. Otherwise just update it for
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* the next poll operation.
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* the next poll operation.
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*
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* This does not apply to mem-free HCAs: they don't use the
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* doorbell count field, and so we should always free the CQE.
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*/
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*/
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if (!(new_wqe & cpu_to_be32(0x3f)) || (!cqe->db_cnt && dbd))
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if (mthca_is_memfree(dev) ||
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!(new_wqe & cpu_to_be32(0x3f)) || (!cqe->db_cnt && dbd))
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return 0;
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return 0;
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cqe->db_cnt = cpu_to_be16(be16_to_cpu(cqe->db_cnt) - dbd);
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cqe->db_cnt = cpu_to_be16(be16_to_cpu(cqe->db_cnt) - dbd);
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