From: Florian Fainelli <f.fainelli@gmail.com>
Date: Sun, 1 Apr 2018 17:26:30 +0000 (-0700)
Subject: net: bgmac: Fix endian access in bgmac_dma_tx_ring_free()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=435290f7a40a2bf033616309137b92cf0c61015d;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

net: bgmac: Fix endian access in bgmac_dma_tx_ring_free()

[ 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@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index 48d672b204a4..a4080f18135c 100644
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -532,7 +532,8 @@ static void bgmac_dma_tx_ring_free(struct bgmac *bgmac,
 	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);