[PATCH 4.16 086/272] net: bgmac: Fix endian access in bgmac_dma_tx_ring_free()

[Greg Kroah-Hartman]

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Florian Fainelli <f.fainelli@xxxxxxxxx>

[ Upstream commit 60d6e6f0b9e422dd01aeda39257ee0428e5e2a3f ]

bgmac_dma_tx_ring_free() assigns the ctl1 word which is a litle endian
32-bit word without using proper accessors, fix this, and because a
length cannot be negative, use unsigned int while at it.

Fixes: 9cde94506eac ("bgmac: implement scatter/gather support")
Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/broadcom/bgmac.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -533,7 +533,8 @@ static void bgmac_dma_tx_ring_free(struc
 	int i;
 
 	for (i = 0; i < BGMAC_TX_RING_SLOTS; i++) {
-		int len = dma_desc[i].ctl1 & BGMAC_DESC_CTL1_LEN;
+		u32 ctl1 = le32_to_cpu(dma_desc[i].ctl1);
+		unsigned int len = ctl1 & BGMAC_DESC_CTL1_LEN;
 
 		slot = &ring->slots[i];
 		dev_kfree_skb(slot->skb);