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net/cxgbe: fix Tx queue stuck with mbuf chain coalescing
[ upstream commit 151e828 ] When trying to coalesce mbufs with chain on Tx side, it is possible to get stuck during queue wrap around. When coalescing this mbuf chain fails, the Tx path returns EBUSY and when the same packet is retried again, it couldn't get coalesced again, and the loop repeats. Fix by pushing the packet through the normal Tx path. Also use FW_ETH_TX_PKTS_WR to handle mbufs with chain for FW to optimize. Fixes: 6c28096 ("net/cxgbe: improve latency for slow traffic") Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
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