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iw_cxgb4: do not send RX_DATA_ACK CPLs after close/abort
Function rx_data(), which handles ingress CPL_RX_DATA messages, was always sending an RX_DATA_ACK with the goal of updating the credits. However, if the RDMA connection is moved out of FPDU mode abruptly, then it is possible for iw_cxgb4 to process queued RX_DATA CPLs after HW has aborted the connection. These CPLs should not trigger RX_DATA_ACKS. If they do, HW can see a READ after DELETE of the DB_LE hash entry for the tid and post a LE_DB HashTblMemCrcError. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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@ -1804,20 +1804,21 @@ static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
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skb_trim(skb, dlen);
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mutex_lock(&ep->com.mutex);
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/* update RX credits */
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update_rx_credits(ep, dlen);
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switch (ep->com.state) {
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case MPA_REQ_SENT:
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update_rx_credits(ep, dlen);
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ep->rcv_seq += dlen;
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disconnect = process_mpa_reply(ep, skb);
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break;
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case MPA_REQ_WAIT:
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update_rx_credits(ep, dlen);
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ep->rcv_seq += dlen;
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disconnect = process_mpa_request(ep, skb);
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break;
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case FPDU_MODE: {
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struct c4iw_qp_attributes attrs;
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update_rx_credits(ep, dlen);
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BUG_ON(!ep->com.qp);
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if (status)
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pr_err("%s Unexpected streaming data." \
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