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net: stmmac: Only the last buffer has the FCS field 

Only the last received buffer contains the FCS field. Check for end of
packet before trying to strip the FCS field.

Fixes: 88ebe2cf7f ("net: stmmac: Rework stmmac_rx()")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jose Abreu 2019-12-18 11:17:38 +01:00 committed by David S. Miller
parent eaf4fac478
commit 93b5dce401
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -3644,8 +3644,9 @@ read_again:
* feature is always disabled and packets need to be
* stripped manually.
*/
if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00) ||
unlikely(status != llc_snap)) {
if (likely(!(status & rx_not_ls)) &&
(likely(priv->synopsys_id >= DWMAC_CORE_4_00) ||
unlikely(status != llc_snap))) {
if (buf2_len)
buf2_len -= ETH_FCS_LEN;
else