John Baldwin 752e211e64 cxgbei: Don't fail task setup if the socket is disconnected.
When the initiator is reconnecting to the target, the connection may
temporarily be marked disconnected or not have an associated socket.
New I/O requests received by the initiator in this state should not
fail with ECONNRESET as that results in an I/O error back to userland.
Instead, they need to still succeed so that CAM can queue the requests
and send them once the connection is re-established.

Setting up DDP for zero-copy receive requires a socket, so just punt
on using DDP for these transfers.

Reported by:	Jithesh Arakkan @ Chelsio
Sponsored by:	Chelsio Communications
2021-12-23 14:14:07 -08:00
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