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>
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b19666d920
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70f1be4812
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@ -622,8 +622,8 @@ static void sky2_mac_init(struct sky2_hw *hw, unsigned port)
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/* Configure Rx MAC FIFO */
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sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_CLR);
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sky2_write16(hw, SK_REG(port, RX_GMF_CTRL_T),
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GMF_RX_CTRL_DEF);
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sky2_write32(hw, SK_REG(port, RX_GMF_CTRL_T),
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GMF_OPER_ON | GMF_RX_F_FL_ON);
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/* Flush Rx MAC FIFO on any flow control or error */
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sky2_write16(hw, SK_REG(port, RX_GMF_FL_MSK), GMR_FS_ANY_ERR);
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@ -995,6 +995,10 @@ static int sky2_rx_start(struct sky2_port *sky2)
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sky2_rx_add(sky2, re->mapaddr);
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}
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/* Truncate oversize frames */
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sky2_write16(hw, SK_REG(sky2->port, RX_GMF_TR_THR), sky2->rx_bufsize - 8);
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sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_ON);
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/* Tell chip about available buffers */
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sky2_write16(hw, Y2_QADDR(rxq, PREF_UNIT_PUT_IDX), sky2->rx_put);
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sky2->rx_last_put = sky2_read16(hw, Y2_QADDR(rxq, PREF_UNIT_PUT_IDX));
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@ -1712,10 +1716,12 @@ static void sky2_tx_timeout(struct net_device *dev)
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#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
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/* Want receive buffer size to be multiple of 64 bits, and incl room for vlan */
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/* Want receive buffer size to be multiple of 64 bits
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* and incl room for vlan and truncation
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*/
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static inline unsigned sky2_buf_size(int mtu)
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{
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return roundup(mtu + ETH_HLEN + 4, 8);
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return roundup(mtu + ETH_HLEN + VLAN_HLEN, 8) + 8;
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}
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static int sky2_change_mtu(struct net_device *dev, int new_mtu)
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@ -1798,7 +1804,7 @@ static struct sk_buff *sky2_receive(struct sky2_port *sky2,
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if (!(status & GMR_FS_RX_OK))
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goto resubmit;
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if ((status >> 16) != length || length > sky2->rx_bufsize)
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if (length > sky2->netdev->mtu + ETH_HLEN)
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goto oversize;
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if (length < copybreak) {
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