linux-kernel - [PATCH net] ethernet: cxgb4: Fix dma_unmap

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Message-ID: <20250623122557.116906-2-fourier.thomas@gmail.com>
Date: Mon, 23 Jun 2025 14:25:55 +0200
From: Thomas Fourier <fourier.thomas@...il.com>
To: 
Cc: Thomas Fourier <fourier.thomas@...il.com>,
	Potnuri Bharat Teja <bharat@...lsio.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Santosh Rastapur <santosh@...lsio.com>,
	Arjun Vynipadath <arjun@...lsio.com>,
	Michael Werner <werner@...lsio.com>,
	Ganesh GR <ganeshgr@...lsio.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net] ethernet: cxgb4: Fix dma_unmap_sg() nents value

The dma_unmap_sg() functions should be called with the same nents as the
dma_map_sg(), not the value the map function returned.

Fixes: 8b4e6b3ca2ed ("cxgb4: Add HMA support")
Signed-off-by: Thomas Fourier <fourier.thomas@...il.com>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 51395c96b2e9..73bb1f413761 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -3998,7 +3998,7 @@ static void adap_free_hma_mem(struct adapter *adapter)
 
 	if (adapter->hma.flags & HMA_DMA_MAPPED_FLAG) {
 		dma_unmap_sg(adapter->pdev_dev, adapter->hma.sgt->sgl,
-			     adapter->hma.sgt->nents, DMA_BIDIRECTIONAL);
+			     adapter->hma.sgt->orig_nents, DMA_BIDIRECTIONAL);
 		adapter->hma.flags &= ~HMA_DMA_MAPPED_FLAG;
 	}
 
-- 
2.43.0