[PATCH 6.19 823/844] net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle

[Sasha Levin]

From: Thomas Fourier <fourier.thomas@xxxxxxxxx>

[ Upstream commit ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2 ]

dma_free_coherent() in error path takes priv->rx_buf.alloc_len as
the dma handle. This would lead to improper unmapping of the buffer.

Change the dma handle to priv->rx_buf.alloc_phys.

Fixes: 6af55ff52b02 ("Driver for Beckhoff CX5020 EtherCAT master module.")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Thomas Fourier <fourier.thomas@xxxxxxxxx>
Link: https://patch.msgid.link/20260213164340.77272-2-fourier.thomas@xxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/ethernet/ec_bhf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ec_bhf.c b/drivers/net/ethernet/ec_bhf.c
index 67275aa4f65b2..0c86cbb0313c3 100644
--- a/drivers/net/ethernet/ec_bhf.c
+++ b/drivers/net/ethernet/ec_bhf.c
@@ -423,7 +423,7 @@ static int ec_bhf_open(struct net_device *net_dev)
 
 error_rx_free:
 	dma_free_coherent(dev, priv->rx_buf.alloc_len, priv->rx_buf.alloc,
-			  priv->rx_buf.alloc_len);
+			  priv->rx_buf.alloc_phys);
 out:
 	return err;
 }
-- 
2.51.0