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| author | adrian <adrian@FreeBSD.org> | 2015-10-30 22:55:41 +0000 |
|---|---|---|
| committer | adrian <adrian@FreeBSD.org> | 2015-10-30 22:55:41 +0000 |
| commit | ea415f2530c9870200e69a1f93ebc3f69c3cf919 (patch) | |
| tree | 3903c11f96e7e05744e855cf110ae76de19bade4 /sys/mips/atheros | |
| parent | 22eed60ca37ae4c72b6237088bf88335e7839104 (diff) | |
| download | FreeBSD-src-ea415f2530c9870200e69a1f93ebc3f69c3cf919.zip FreeBSD-src-ea415f2530c9870200e69a1f93ebc3f69c3cf919.tar.gz | |
arge: ensure there's enough space in the TX ring before attempting to
send frames.
This matches the other check for space.
"enough" is a misnomer, for "reasons". The biggest reason is that
the TX ring is actually a circular linked list, with no head/tail pointers.
This is just a bit more headroom between head/tail so we have time to
schedule frames before we hit where the hardware is at.
Ideally this would be tunable and a little larger.
Diffstat (limited to 'sys/mips/atheros')
| -rw-r--r-- | sys/mips/atheros/if_arge.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/mips/atheros/if_arge.c b/sys/mips/atheros/if_arge.c index b300b70..63fbd9f 100644 --- a/sys/mips/atheros/if_arge.c +++ b/sys/mips/atheros/if_arge.c @@ -1501,7 +1501,7 @@ arge_encap(struct arge_softc *sc, struct mbuf **m_head) } /* Check number of available descriptors. */ - if (sc->arge_cdata.arge_tx_cnt + nsegs >= (ARGE_TX_RING_COUNT - 1)) { + if (sc->arge_cdata.arge_tx_cnt + nsegs >= (ARGE_TX_RING_COUNT - 2)) { bus_dmamap_unload(sc->arge_cdata.arge_tx_tag, txd->tx_dmamap); sc->stats.tx_pkts_nosegs++; return (ENOBUFS); |
