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Code Issues Releases Activity

Don't panic even if bus_dmamap_load(9) was failed. Just return

Browse Source 
ENOBUFS so callers can reuse previous mbuf.

Submitted by:	Oleg  (agile.quad AT gmail DOT com)
MFC after:	1 week
This commit is contained in:
Pyun YongHyeon 2008-04-30 02:49:24 +00:00
parent 1c17588fda
commit 49b2d728a8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=178687
1 changed files with 11 additions and 3 deletions
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14
sys/dev/bfe/if_bfe.c
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@ -646,16 +646,18 @@ bfe_list_newbuf(struct bfe_softc *sc, int c, struct mbuf *m)
struct bfe_desc *d;
struct bfe_data *r;
u_int32_t ctrl;
int error;
int allocated, error;
if ((c < 0) || (c >= BFE_RX_LIST_CNT))
return (EINVAL);
allocated = 0;
if(m == NULL) {
m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
if(m == NULL)
return (ENOBUFS);
m->m_len = m->m_pkthdr.len = MCLBYTES;
allocated++;
}
else
m->m_data = m->m_ext.ext_buf;
@ -670,8 +672,14 @@ bfe_list_newbuf(struct bfe_softc *sc, int c, struct mbuf *m)
r = &sc->bfe_rx_ring[c];
error = bus_dmamap_load(sc->bfe_tag, r->bfe_map, mtod(m, void *),
MCLBYTES, bfe_dma_map_desc, d, BUS_DMA_NOWAIT);
if (error)
printf("Serious error: bfe failed to map RX buffer\n");
if (error != 0) {
if (allocated != 0)
m_free(m);
if (error != ENOMEM)
printf("bfe%d: failed to map RX buffer, error %d\n",
sc->bfe_unit, error);
return (ENOBUFS);
}
bus_dmamap_sync(sc->bfe_tag, r->bfe_map, BUS_DMASYNC_PREWRITE);
ctrl = ETHER_MAX_LEN + 32;