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hyperv/hn: Fix # of channels setting, if RSS is not available.

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MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D7657
This commit is contained in:
Sepherosa Ziehau 2016-08-29 05:08:53 +00:00
parent e4e0ef792c
commit 7681d6725a
1 changed files with 10 additions and 4 deletions
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14
sys/dev/hyperv/netvsc/hv_rndis_filter.c
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@ -1377,8 +1377,14 @@ hv_rf_on_device_add(struct hn_softc *sc, void *additl_info,
dev_info->link_state = rndis_dev->link_status; dev_info->link_state = rndis_dev->link_status;
if (sc->hn_ndis_ver < NDIS_VERSION_6_30 || nchan == 1) if (sc->hn_ndis_ver < NDIS_VERSION_6_30 || nchan == 1) {
/*
* Either RSS is not supported, or multiple RX/TX rings
* are not requested.
*/
*nchan0 = 1;
return (0); return (0);
}
/* /*
* Get RSS capabilities, e.g. # of RX rings, and # of indirect * Get RSS capabilities, e.g. # of RX rings, and # of indirect
@ -1386,9 +1392,9 @@ hv_rf_on_device_add(struct hn_softc *sc, void *additl_info,
*/ */
ret = hn_rndis_get_rsscaps(sc, &rxr_cnt); ret = hn_rndis_get_rsscaps(sc, &rxr_cnt);
if (ret) { if (ret) {
/* This is benign. */ /* No RSS; this is benign. */
ret = 0; *nchan0 = 1;
goto out; return (0);
} }
if (nchan > rxr_cnt) if (nchan > rxr_cnt)
nchan = rxr_cnt; nchan = rxr_cnt;