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Apply alignment fixup only when programmed frame size is greater than

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MCLBYTES - ETHER_ALIGN. Previously it applied the alignment fixup code
for oversized frames which would result in reduced performance on
strict alignment archs.
This commit is contained in:
Pyun YongHyeon 2006-08-14 00:36:53 +00:00
parent b7e2f3ec76
commit 1ad7bca7e9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=161265
1 changed files with 3 additions and 3 deletions
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6
sys/dev/em/if_em.c
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@ -2805,7 +2805,6 @@ em_txeof(struct adapter *adapter)
static int
em_get_buf(int i, struct adapter *adapter, struct mbuf *mp)
{
struct ifnet *ifp = adapter->ifp;
bus_dma_segment_t segs[1];
struct em_buffer *rx_buffer;
int error, nsegs;
@ -2823,7 +2822,7 @@ em_get_buf(int i, struct adapter *adapter, struct mbuf *mp)
mp->m_next = NULL;
}
if (ifp->if_mtu <= ETHERMTU)
if (adapter->hw.max_frame_size <= (MCLBYTES - ETHER_ALIGN))
m_adj(mp, ETHER_ALIGN);
rx_buffer = &adapter->rx_buffer_area[i];
@ -3187,7 +3186,8 @@ em_rxeof(struct adapter *adapter, int count)
em_receive_checksum(adapter, current_desc,
adapter->fmp);
#ifndef __NO_STRICT_ALIGNMENT
if (ifp->if_mtu > ETHERMTU &&
if (adapter->hw.max_frame_size >
(MCLBYTES - ETHER_ALIGN) &&
em_fixup_rx(adapter) != 0)
goto skip;
#endif