Author: arybchik
Date: Sun Feb 22 07:16:11 2015
New Revision: 279144
URL: https://svnweb.freebsd.org/changeset/base/279144
Log:
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:
head/sys/dev/sfxge/sfxge_tx.c
Modified: head/sys/dev/sfxge/sfxge_tx.c
==============================================================================
--- head/sys/dev/sfxge/sfxge_tx.c Sun Feb 22 07:14:12 2015
(r279143)
+++ head/sys/dev/sfxge/sfxge_tx.c Sun Feb 22 07:16:11 2015
(r279144)
@@ -1104,8 +1104,8 @@ 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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