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net: stmmac: xgmac: Only get SPH header len if available

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Split Header length is only available when L34T == 0. Fix this by
correctly checking if L34T is zero before trying to get Header length.

Fixes: 67afd6d1cf ("net: stmmac: Add Split Header support and enable it in XGMAC cores")
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 2019-11-06 16:02:58 +01:00 • committed by David S. Miller
parent eeb9d74516
commit 96147375d4
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
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@ -288,7 +288,8 @@ static int dwxgmac2_get_rx_hash(struct dma_desc *p, u32 *hash,
static int dwxgmac2_get_rx_header_len(struct dma_desc *p, unsigned int *len)
{
*len = le32_to_cpu(p->des2) & XGMAC_RDES2_HL;
if (le32_to_cpu(p->des3) & XGMAC_RDES3_L34T)
*len = le32_to_cpu(p->des2) & XGMAC_RDES2_HL;
return 0;
}