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ntb: Use consistent DMA attributes when freeing DMA mappings

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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: 061a785a11 ("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
This commit is contained in:
Leon Romanovsky
2026-05-01 09:35:06 +03:00
committed by Marek Szyprowski
parent da6d997ac5
commit 9d625aa2eb
1 changed files with 4 additions and 4 deletions
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8
drivers/ntb/ntb_transport.c
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@@ -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;
}