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Instead of keeping track of the index into the receive ring use the already

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implemented "sis_nextdesc" pointer to keep a pointer instead.
This commit is contained in:
Poul-Henning Kamp 2005-01-04 22:39:35 +00:00
parent 32a300364d
commit dc010b7380
2 changed files with 6 additions and 8 deletions
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12
sys/pci/if_sis.c
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@ -1502,7 +1502,7 @@ sis_list_rx_init(sc)
bus_dmamap_sync(sc->sis_rx_tag,
sc->sis_rx_dmamap, BUS_DMASYNC_PREWRITE);
sc->sis_rx_prod = 0;
sc->sis_rx_pdsc = &sc->sis_rx_list[0];
return(0);
}
@ -1550,15 +1550,15 @@ sis_rxeof(sc)
struct mbuf *m;
struct ifnet *ifp;
struct sis_desc *cur_rx;
int i, total_len = 0;
int total_len = 0;
u_int32_t rxstat;
SIS_LOCK_ASSERT(sc);
ifp = &sc->arpcom.ac_if;
i = sc->sis_rx_prod;
while(SIS_OWNDESC(&sc->sis_rx_list[i])) {
for(cur_rx = sc->sis_rx_pdsc; SIS_OWNDESC(cur_rx);
cur_rx = cur_rx->sis_nextdesc) {
#ifdef DEVICE_POLLING
if (ifp->if_flags & IFF_POLLING) {
@ -1567,7 +1567,6 @@ sis_rxeof(sc)
sc->rxcycles--;
}
#endif /* DEVICE_POLLING */
cur_rx = &sc->sis_rx_list[i];
rxstat = cur_rx->sis_rxstat;
bus_dmamap_sync(sc->sis_tag,
cur_rx->sis_map, BUS_DMASYNC_POSTWRITE);
@ -1576,7 +1575,6 @@ sis_rxeof(sc)
m = cur_rx->sis_mbuf;
cur_rx->sis_mbuf = NULL;
total_len = SIS_RXBYTES(cur_rx);
SIS_INC(i, SIS_RX_LIST_CNT);
/*
* If an error occurs, update stats, clear the
@ -1627,7 +1625,7 @@ sis_rxeof(sc)
SIS_LOCK(sc);
}
sc->sis_rx_prod = i;
sc->sis_rx_pdsc = cur_rx;
return;
}

2
sys/pci/if_sisreg.h
View File

@ -450,7 +450,7 @@ struct sis_softc {
bus_dmamap_t sis_tx_dmamap;
bus_dma_tag_t sis_parent_tag;
bus_dma_tag_t sis_tag;
int sis_rx_prod;
struct sis_desc *sis_rx_pdsc;
int sis_tx_prod;
int sis_tx_cons;
int sis_tx_cnt;