diff options
| author | Jun-ichiro itojun Hagino <itojun@FreeBSD.org> | 1997-10-01 05:54:58 +0000 |
|---|---|---|
| committer | Jun-ichiro itojun Hagino <itojun@FreeBSD.org> | 1997-10-01 05:54:58 +0000 |
| commit | b51da36807dd378ca35e7d098d8813bcc73885f3 (patch) | |
| tree | 8c296081f8424ff5b699306032a12cd400f2d755 /sys/dev/vx | |
| parent | 34de7199ea2963cae5cfe91bc9f7f62ff4f9c9f6 (diff) | |
| download | src-b51da36807dd378ca35e7d098d8813bcc73885f3.tar.gz src-b51da36807dd378ca35e7d098d8813bcc73885f3.zip | |
To obey the traditional practice in mbuf chaining.
PR: 4020
Reviewed by: hamada@astec.co.jp
Notes
Notes:
svn path=/head/; revision=30022
Diffstat (limited to 'sys/dev/vx')
| -rw-r--r-- | sys/dev/vx/if_vx.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/sys/dev/vx/if_vx.c b/sys/dev/vx/if_vx.c index 71799bf54256..f1f744f2ec42 100644 --- a/sys/dev/vx/if_vx.c +++ b/sys/dev/vx/if_vx.c @@ -850,6 +850,12 @@ vxget(sc, totlen) */ sh = splhigh(); + /* + * Since we don't set allowLargePackets bit in MacControl register, + * we can assume that totlen <= 1500bytes. + * The while loop will be performed iff we have a packet with + * MLEN < m_len < MINCLSIZE. + */ while (totlen > 0) { if (top) { m = sc->mb[sc->next_mb]; @@ -867,18 +873,17 @@ vxget(sc, totlen) len = MLEN; } if (totlen >= MINCLSIZE) { - MCLGET(m, M_DONTWAIT); - if (m->m_flags & M_EXT) - len = MCLBYTES; + MCLGET(m, M_DONTWAIT); + if (m->m_flags & M_EXT) + len = MCLBYTES; } len = min(totlen, len); - if (len > 3) { - len &= ~3; - insl(BASE + VX_W1_RX_PIO_RD_1, mtod(m, u_int32_t *), - len / 4); - } else - insb(BASE + VX_W1_RX_PIO_RD_1, mtod(m, u_int8_t *), - len); + if (len > 3) + insl(BASE + VX_W1_RX_PIO_RD_1, mtod(m, u_int32_t *), len / 4); + if (len & 3) { + insb(BASE + VX_W1_RX_PIO_RD_1, mtod(m, u_int8_t *) + (len & ~3), + len & 3); + } m->m_len = len; totlen -= len; *mp = m; |