The hardware may report a packet longer than our receive buffer. Instead
of reading past the read buffer, discard too long packets.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
drivers/net/smc911x.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index 1fca58ab84..8a0fa5cc25 100644
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -460,14 +460,14 @@ static int smc911x_eth_rx(struct eth_device *edev)
smc911x_reg_write(priv, RX_CFG, 0);
tmplen = (pktlen + 3) / 4;
- while(tmplen--)
- *data++ = smc911x_reg_read(priv, RX_DATA_FIFO);
-
- if(status & RX_STS_ES)
- dev_err(&edev->dev, "dropped bad packet. Status: 0x%08x\n",
- status);
- else
- net_receive(edev, priv->rx_buf, pktlen);
+
+ if (pktlen > PKTSIZE || (status & RX_STS_ES)) {
+ while (tmplen--)
+ smc911x_reg_read(priv, RX_DATA_FIFO);
+ } else {
+ while (tmplen--)
+ *data++ = smc911x_reg_read(priv, RX_DATA_FIFO);
+ }
}
return 0;
--
2.39.2
