Re: [PATCH net 1/2] hinic3: Fix skb_checksum_help() failure handling in Tx path

From: Fan Gong <gongfan1@huawei.com>

hinic3_tx_csum() falls back to skb_checksum_help() for unsupported VXLAN
packets, but ignores its return value. On failure, this can cause packets
with uncalculated or corrupted checksums to be transmitted.

Fix this by returning the error status of skb_checksum_help() and marking
the offload as HINIC3_TX_OFFLOAD_INVALID in hinic3_tx_offload() so that the
packet is properly dropped.

Fixes: 17fcb3dc12bb ("hinic3: module initialization and tx/rx logic")

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