IB/mthca: Set GRH:HopLimit when building MLX headers
Global CM packets used by rmda_cm were being sent with a GRH:hopLimit of zero, causing them to be dropped by the router. The problem is a missing initialization of the hop_limit field in mthca_read_ah(), which was called by build_mlx_header() when sending a MAD on QP1. Signed-off-by: Rolf Manderscheid <rvm@obsidianresearch.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -279,6 +279,7 @@ int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
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(be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20) & 0xff;
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header->grh.flow_label =
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ah->av->sl_tclass_flowlabel & cpu_to_be32(0xfffff);
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header->grh.hop_limit = ah->av->hop_limit;
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ib_get_cached_gid(&dev->ib_dev,
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be32_to_cpu(ah->av->port_pd) >> 24,
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ah->av->gid_index % dev->limits.gid_table_len,
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