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authorStephen Hemminger <shemminger@osdl.org>2006-03-07 11:06:37 -0800
committerFrancois Romieu <romieu@fr.zoreil.com>2006-03-09 23:19:03 +0100
commit70f1be4812a833ac856818c3149e432ff6a84c2e (patch)
tree35bfffeb385e987ba98bcb81a9216291c210c501 /drivers/net
parentb19666d92009ad2aa8e12d25f2cab59fb32421eb (diff)
sky2: truncate oversize packets
Turn on truncation to prevent getting choked by frames larger than expected. Without this fix, driver hangs after receiving an oversize packet. Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/sky2.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 1078b7cab076..73260364cba3 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -622,8 +622,8 @@ static void sky2_mac_init(struct sky2_hw *hw, unsigned port)
/* Configure Rx MAC FIFO */
sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_CLR);
- sky2_write16(hw, SK_REG(port, RX_GMF_CTRL_T),
- GMF_RX_CTRL_DEF);
+ sky2_write32(hw, SK_REG(port, RX_GMF_CTRL_T),
+ GMF_OPER_ON | GMF_RX_F_FL_ON);
/* Flush Rx MAC FIFO on any flow control or error */
sky2_write16(hw, SK_REG(port, RX_GMF_FL_MSK), GMR_FS_ANY_ERR);
@@ -995,6 +995,10 @@ static int sky2_rx_start(struct sky2_port *sky2)
sky2_rx_add(sky2, re->mapaddr);
}
+ /* Truncate oversize frames */
+ sky2_write16(hw, SK_REG(sky2->port, RX_GMF_TR_THR), sky2->rx_bufsize - 8);
+ sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_ON);
+
/* Tell chip about available buffers */
sky2_write16(hw, Y2_QADDR(rxq, PREF_UNIT_PUT_IDX), sky2->rx_put);
sky2->rx_last_put = sky2_read16(hw, Y2_QADDR(rxq, PREF_UNIT_PUT_IDX));
@@ -1712,10 +1716,12 @@ static void sky2_tx_timeout(struct net_device *dev)
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
-/* Want receive buffer size to be multiple of 64 bits, and incl room for vlan */
+/* Want receive buffer size to be multiple of 64 bits
+ * and incl room for vlan and truncation
+ */
static inline unsigned sky2_buf_size(int mtu)
{
- return roundup(mtu + ETH_HLEN + 4, 8);
+ return roundup(mtu + ETH_HLEN + VLAN_HLEN, 8) + 8;
}
static int sky2_change_mtu(struct net_device *dev, int new_mtu)
@@ -1798,7 +1804,7 @@ static struct sk_buff *sky2_receive(struct sky2_port *sky2,
if (!(status & GMR_FS_RX_OK))
goto resubmit;
- if ((status >> 16) != length || length > sky2->rx_bufsize)
+ if (length > sky2->netdev->mtu + ETH_HLEN)
goto oversize;
if (length < copybreak) {