diff options
Diffstat (limited to 'freebsd/sys/dev/e1000/em_txrx.c')
| -rw-r--r-- | freebsd/sys/dev/e1000/em_txrx.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/freebsd/sys/dev/e1000/em_txrx.c b/freebsd/sys/dev/e1000/em_txrx.c index 3ceada31..c2b60743 100644 --- a/freebsd/sys/dev/e1000/em_txrx.c +++ b/freebsd/sys/dev/e1000/em_txrx.c @@ -460,7 +460,13 @@ em_isc_txd_credits_update(void *arg, uint16_t txqid, bool clear) ntxd = scctx->isc_ntxd[0]; do { delta = (int32_t)cur - (int32_t)prev; + /* + * XXX This appears to be a hack for first-packet. + * A correct fix would prevent prev == cur in the first place. + */ MPASS(prev == 0 || delta != 0); + if (prev == 0 && cur == 0) + delta += 1; if (delta < 0) delta += ntxd; DPRINTF(iflib_get_dev(adapter->ctx), |