[PATCH] net: designware: fix bus address dereference

[Baruch Siach]

Device bus address might not be valid for direct access when the bus
address and CPU address are not the same. Use dev_bus_to_phys() to
translate bus address back to CPU address.

Fixes: 3d98b8c504e15 ("net: designware: Invalidate RX buffer cache before freeing the DMA descriptor")
Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
 drivers/net/designware.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 0f93c25e3fed..fce3ef910cb2 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -716,7 +716,7 @@ static int _dw_free_pkt(struct dw_eth_dev *priv)
 	ulong desc_start = (ulong)desc_p;
 	ulong desc_end = desc_start +
 		roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN);
-	ulong data_start = desc_p->dmamac_addr;
+	ulong data_start = dev_bus_to_phys(priv->dev, desc_p->dmamac_addr);
 	ulong data_end = data_start + roundup(CFG_ETH_BUFSIZE, ARCH_DMA_MINALIGN);
 
 	/* Invalidate the descriptor buffer data */
-- 
2.47.2