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| author | Stephane Graber <stgraber@ubuntu.com> | 2022-03-22 18:42:06 -0400 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-03-23 10:30:05 -0700 |
| commit | e9e6faeafaa00da1851bcf47912b0f1acae666b4 (patch) | |
| tree | 117eabe950c4ee883ec7e840b198c8b3040d1ccb /drivers/net | |
| parent | 36c2e31ad25bd087756b8db9584994d1d80c236b (diff) | |
| download | linux-stable-e9e6faeafaa00da1851bcf47912b0f1acae666b4.tar.gz linux-stable-e9e6faeafaa00da1851bcf47912b0f1acae666b4.tar.bz2 linux-stable-e9e6faeafaa00da1851bcf47912b0f1acae666b4.zip | |
drivers: net: xgene: Fix regression in CRC stripping
All packets on ingress (except for jumbo) are terminated with a 4-bytes
CRC checksum. It's the responsability of the driver to strip those 4
bytes. Unfortunately a change dating back to March 2017 re-shuffled some
code and made the CRC stripping code effectively dead.
This change re-orders that part a bit such that the datalen is
immediately altered if needed.
Fixes: 4902a92270fb ("drivers: net: xgene: Add workaround for errata 10GE_8/ENET_11")
Cc: stable@vger.kernel.org
Signed-off-by: Stephane Graber <stgraber@ubuntu.com>
Tested-by: Stephane Graber <stgraber@ubuntu.com>
Link: https://lore.kernel.org/r/20220322224205.752795-1-stgraber@ubuntu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c index ff2d099aab21..53dc8d5fede8 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c @@ -696,6 +696,12 @@ static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring, buf_pool->rx_skb[skb_index] = NULL; datalen = xgene_enet_get_data_len(le64_to_cpu(raw_desc->m1)); + + /* strip off CRC as HW isn't doing this */ + nv = GET_VAL(NV, le64_to_cpu(raw_desc->m0)); + if (!nv) + datalen -= 4; + skb_put(skb, datalen); prefetch(skb->data - NET_IP_ALIGN); skb->protocol = eth_type_trans(skb, ndev); @@ -717,12 +723,8 @@ static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring, } } - nv = GET_VAL(NV, le64_to_cpu(raw_desc->m0)); - if (!nv) { - /* strip off CRC as HW isn't doing this */ - datalen -= 4; + if (!nv) goto skip_jumbo; - } slots = page_pool->slots - 1; head = page_pool->head; |