Author: arybchik
Date: Wed Mar 25 11:08:41 2015
New Revision: 280566
URL: https://svnweb.freebsd.org/changeset/base/280566
Log:
MFC: 279144
sfxge: packet can't require more than n_dma_seg descriptors plus one
Use remaining number of DMA segment instead of maximum number in mapping
when checking space for one more TSO segment packet.
Sponsored by: Solarflare Communications, Inc.
Approved by: gnn (mentor)
Modified:
stable/10/sys/dev/sfxge/sfxge_tx.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/dev/sfxge/sfxge_tx.c
==============================================================================
--- stable/10/sys/dev/sfxge/sfxge_tx.c Wed Mar 25 11:07:56 2015
(r280565)
+++ stable/10/sys/dev/sfxge/sfxge_tx.c Wed Mar 25 11:08:41 2015
(r280566)
@@ -1103,8 +1103,8 @@ sfxge_tx_queue_tso(struct sfxge_txq *txq
* the remainder of the input mbuf but do not
* roll back the work we have done.
*/
- if (txq->n_pend_desc >
- SFXGE_TSO_MAX_DESC - (1 +
SFXGE_TX_MAPPING_MAX_SEG)) {
+ if (txq->n_pend_desc + 1 /* header */ + n_dma_seg >
+ SFXGE_TSO_MAX_DESC) {
txq->tso_pdrop_too_many++;
break;
}
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