[PATCH 5.10 013/202] ravb: Fix up dma_free_coherent() call in ravb_remove()

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

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

From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>

[ Upstream commit e6864af61493113558c502b5cd0d754c19b93277 ]

In ravb_remove(), dma_free_coherent() should be call after
unregister_netdev(). Otherwise, this controller is possible to use
the freed buffer.

Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Reviewed-by: Sergey Shtylyov <s.shtylyov@xxxxxx>
Link: https://lore.kernel.org/r/20231005011201.14368-2-yoshihiro.shimoda.uh@xxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/ethernet/renesas/ravb_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 410ccd28f6531..a59da6a119769 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2249,14 +2249,14 @@ static int ravb_remove(struct platform_device *pdev)
 	if (priv->chip_id != RCAR_GEN2)
 		ravb_ptp_stop(ndev);
 
-	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
-			  priv->desc_bat_dma);
 	/* Set reset mode */
 	ravb_write(ndev, CCC_OPC_RESET, CCC);
 	unregister_netdev(ndev);
 	netif_napi_del(&priv->napi[RAVB_NC]);
 	netif_napi_del(&priv->napi[RAVB_BE]);
 	ravb_mdio_release(priv);
+	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
+			  priv->desc_bat_dma);
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 	free_netdev(ndev);
-- 
2.40.1






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