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[PW_SID:1061719] net: spacemit: A few error handling fixes #1556

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[PW_SID:1061719] net: spacemit: A few error handling fixes #1556

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f7f2463
net: spacemit: Fix error handling in emac_alloc_rx_desc_buffers()
dramforever Mar 5, 2026
0007151
net: spacemit: Fix error handling in emac_tx_mem_map()
dramforever Mar 5, 2026
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19 changes: 13 additions & 6 deletions drivers/net/ethernet/spacemit/k1_emac.c
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Original file line number Diff line number Diff line change
Expand Up @@ -567,7 +567,9 @@ static void emac_alloc_rx_desc_buffers(struct emac_priv *priv)
DMA_FROM_DEVICE);
if (dma_mapping_error(&priv->pdev->dev, rx_buf->dma_addr)) {
dev_err_ratelimited(&ndev->dev, "Mapping skb failed\n");
goto err_free_skb;
dev_kfree_skb_any(skb);
rx_buf->skb = NULL;
break;
}

rx_desc_addr = &((struct emac_desc *)rx_ring->desc_addr)[i];
Expand All @@ -592,10 +594,6 @@ static void emac_alloc_rx_desc_buffers(struct emac_priv *priv)

rx_ring->head = i;
return;

err_free_skb:
dev_kfree_skb_any(skb);
rx_buf->skb = NULL;
}

/* Returns number of packets received */
Expand Down Expand Up @@ -737,7 +735,7 @@ static void emac_tx_mem_map(struct emac_priv *priv, struct sk_buff *skb)
struct emac_desc tx_desc, *tx_desc_addr;
struct device *dev = &priv->pdev->dev;
struct emac_tx_desc_buffer *tx_buf;
u32 head, old_head, frag_num, f;
u32 head, old_head, frag_num, f, i;
bool buf_idx;

frag_num = skb_shinfo(skb)->nr_frags;
Expand Down Expand Up @@ -805,6 +803,15 @@ static void emac_tx_mem_map(struct emac_priv *priv, struct sk_buff *skb)

err_free_skb:
dev_dstats_tx_dropped(priv->ndev);

i = old_head;
while (i != head) {
emac_free_tx_buf(priv, i);

if (++i == tx_ring->total_cnt)
i = 0;
}

dev_kfree_skb_any(skb);
}

Expand Down