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net/mlx5: fix multi segment packet send

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Dseg pointer is not initialized when the first segment is inlined
causing a segmentation fault in such situation.

Fixes: 2a66cf3789 ("net/mlx5: support inline send")

Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
This commit is contained in:
Shahaf Shuler 2016-12-26 17:28:36 +02:00 committed by Ferruh Yigit
parent 30807f62b2
commit 786b5c2dac
1 changed files with 5 additions and 1 deletions
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6
drivers/net/mlx5/mlx5_rxtx.c
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@ -484,7 +484,7 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
assert(addr <= addr_end);
}
/*
* 2 DWORDs consumed by the WQE header + 1 DSEG +
* 2 DWORDs consumed by the WQE header + ETH segment +
* the size of the inline part of the packet.
*/
ds = 2 + MLX5_WQE_DS(pkt_inline_sz - 2);
@ -499,6 +499,10 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
} else if (!segs_n) {
goto next_pkt;
} else {
/* dseg will be advance as part of next_seg */
dseg = (volatile rte_v128u32_t *)
((uintptr_t)wqe +
((ds - 1) * MLX5_WQE_DWORD_SIZE));
goto next_seg;
}
} else {