net: designware: fix bus address dereference

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@tkos.co.il>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>

diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 0f93c25..fce3ef9 100644 (file)
--- 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 */