diff options
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 3f69f53d7768..908422f2f320 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 */ |