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authorPhil Sutter <n0-1@freewrt.org>2009-01-14 21:47:50 -0800
committerDavid S. Miller <davem@davemloft.net>2009-01-15 08:28:18 -0800
commita13b27826a67bfc0ca444fb42885f2069b6898e2 (patch)
tree7eaaf4f96c8dddfb6cfeead4996d930b8f7ad57a
parentb96ecfa689126d1e652ebd758da0b5b9b27dbd12 (diff)
downloadop-kernel-dev-a13b27826a67bfc0ca444fb42885f2069b6898e2.zip
op-kernel-dev-a13b27826a67bfc0ca444fb42885f2069b6898e2.tar.gz
korina: reset resource buffer size to 1536
The new value is the one used in the external patch before and allows at least a standard MTU of 1500 to be handled correctly. Impact of this change gets visible when bigger packets are to be received, issuing: | ping -s 492 <IP> and bigger payload sized led to 100% packet loss. Signed-off-by: Phil Sutter <n0-1@freewrt.org> Acked-by: Florian Fainelli <florian@openwrt.org Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/korina.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/korina.c b/drivers/net/korina.c
index fefb33d..e30c2f4 100644
--- a/drivers/net/korina.c
+++ b/drivers/net/korina.c
@@ -84,7 +84,10 @@
#define KORINA_NUM_RDS 64 /* number of receive descriptors */
#define KORINA_NUM_TDS 64 /* number of transmit descriptors */
-#define KORINA_RBSIZE 536 /* size of one resource buffer = Ether MTU */
+/* KORINA_RBSIZE is the hardware's default maximum receive
+ * frame size in bytes. Having this hardcoded means that there
+ * is no support for MTU sizes greater than 1500. */
+#define KORINA_RBSIZE 1536 /* size of one resource buffer = Ether MTU */
#define KORINA_RDS_MASK (KORINA_NUM_RDS - 1)
#define KORINA_TDS_MASK (KORINA_NUM_TDS - 1)
#define RD_RING_SIZE (KORINA_NUM_RDS * sizeof(struct dma_desc))
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