ntb: Use consistent DMA attributes when freeing DMA mappings

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>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20260501-dma-attrs-debug-v2-2-8dbac75cd501@nvidia.com

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 771eb7d9f43560a04740dae14cab9546256fea59..f59f926d4bfaa94f338755c642fa4d04753bca42 100644 (file)
--- 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;
 }