diff options
| author | David S. Miller <davem@davemloft.net> | 2008-04-17 14:13:13 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-17 14:13:13 -0700 |
| commit | 2e5a3eaca386ce026f240c7b21e5c4958fcea946 (patch) | |
| tree | 191cf2b340d008b711137ce8c40b27a3dadff8d5 /drivers/net/tulip/tulip.h | |
| parent | 8c95b4773dd8d0415269ffad7301ef96d75be8ee (diff) | |
| parent | 36b30ea940bb88d88c90698e0e3d97a805ab5856 (diff) | |
Merge branch 'upstream-net26' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
Diffstat (limited to 'drivers/net/tulip/tulip.h')
| -rw-r--r-- | drivers/net/tulip/tulip.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/tulip/tulip.h b/drivers/net/tulip/tulip.h index 3f69f53d776..908422f2f32 100644 --- a/drivers/net/tulip/tulip.h +++ b/drivers/net/tulip/tulip.h @@ -268,7 +268,12 @@ enum t21143_csr6_bits { #define RX_RING_SIZE 128 #define MEDIA_MASK 31 -#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer. */ +/* The receiver on the DC21143 rev 65 can fail to close the last + * receive descriptor in certain circumstances (see errata) when + * using MWI. This can only occur if the receive buffer ends on + * a cache line boundary, so the "+ 4" below ensures it doesn't. + */ +#define PKT_BUF_SZ (1536 + 4) /* Size of each temporary Rx buffer. */ #define TULIP_MIN_CACHE_LINE 8 /* in units of 32-bit words */ |