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hyperv/hn: Fix multi-packet RNDIS message aggregation size setting.

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Just in case that no chimney sending buffer can be used.

MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8619
This commit is contained in:
Sepherosa Ziehau 2016-11-28 05:31:36 +00:00
parent 2494d735e2
commit a4364cfea9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=309228
1 changed files with 4 additions and 4 deletions
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8
sys/dev/hyperv/netvsc/if_hn.c
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@ -706,6 +706,10 @@ hn_set_txagg(struct hn_softc *sc)
if (sc->hn_rndis_agg_size < size) if (sc->hn_rndis_agg_size < size)
size = sc->hn_rndis_agg_size; size = sc->hn_rndis_agg_size;
/* NOTE: We only aggregate packets using chimney sending buffers. */
if (size > (uint32_t)sc->hn_chim_szmax)
size = sc->hn_chim_szmax;
if (size <= 2 * HN_PKTSIZE_MIN(sc->hn_rndis_agg_align)) { if (size <= 2 * HN_PKTSIZE_MIN(sc->hn_rndis_agg_align)) {
/* Disable */ /* Disable */
size = 0; size = 0;
@ -717,10 +721,6 @@ hn_set_txagg(struct hn_softc *sc)
if (size > INT_MAX) if (size > INT_MAX)
size = INT_MAX; size = INT_MAX;
/* NOTE: We only aggregate packets using chimney sending buffers. */
if (size > (uint32_t)sc->hn_chim_szmax)
size = sc->hn_chim_szmax;
/* /*
* Setup aggregation packet count. * Setup aggregation packet count.
*/ */