[PATCH v2 2/6] ntb: Use consistent DMA attributes when freeing DMA mappings

[Leon Romanovsky <leon@kernel.org>]

From: Leon Romanovsky <leonro@nvidia.com>

The counterpart of dma_alloc_attrs() is dma_free_attrs(), which must
receive the same DMA attributes used during allocation. The code
previously used dma_free_coherent(), which does not accept or apply any
DMA attributes.

Fixes: 061a785a114f ("ntb: Force physically contiguous allocation of rx ring buffers")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 drivers/ntb/ntb_transport.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 771eb7d9f4356..f59f926d4bfaa 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -766,8 +766,8 @@ static void ntb_free_mw(struct ntb_transport_ctx *nt, int num_mw)
 		return;
 
 	ntb_mw_clear_trans(nt->ndev, PIDX, num_mw);
-	dma_free_coherent(dma_dev, mw->alloc_size,
-			  mw->alloc_addr, mw->original_dma_addr);
+	dma_free_attrs(dma_dev, mw->alloc_size, mw->alloc_addr,
+		       mw->original_dma_addr, DMA_ATTR_FORCE_CONTIGUOUS);
 	mw->xlat_size = 0;
 	mw->buff_size = 0;
 	mw->alloc_size = 0;
@@ -828,8 +828,8 @@ static int ntb_alloc_mw_buffer(struct ntb_transport_mw *mw,
 	return 0;
 
 err:
-	dma_free_coherent(ntb_dev, mw->alloc_size, alloc_addr, dma_addr);
-
+	dma_free_attrs(ntb_dev, mw->alloc_size, alloc_addr, dma_addr,
+		       DMA_ATTR_FORCE_CONTIGUOUS);
 	return rc;
 }
 

-- 
2.53.0