diff options
| author | Leon Romanovsky <leonro@nvidia.com> | 2026-05-01 09:35:05 +0300 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2026-05-08 23:28:19 +0300 |
| commit | da6d997ac556479c112554ab5d95cbd04683eb11 (patch) | |
| tree | 7295627fbcaca576475457de7d0dd66caf74ad7d | |
| parent | 254f49634ee16a731174d2ae34bc50bd5f45e731 (diff) | |
| download | linux-da6d997ac556479c112554ab5d95cbd04683eb11.tar.xz | |
ntb: Store original DMA address for future release
The DMA API requires that dma_free_attrs receive the exact dma_handle
originally returned by the allocation function. Do not modify it.
Fixes: fc5d1829f9bf ("NTB: transport: Try harder to alloc an aligned MW buffer")
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-v2-1-8dbac75cd501@nvidia.com
| -rw-r--r-- | drivers/ntb/ntb_transport.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index 7cabc82305d6..771eb7d9f435 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -223,6 +223,7 @@ struct ntb_transport_mw { void *alloc_addr; void *virt_addr; dma_addr_t dma_addr; + dma_addr_t original_dma_addr; }; struct ntb_transport_client_dev { @@ -766,7 +767,7 @@ static void ntb_free_mw(struct ntb_transport_ctx *nt, int num_mw) ntb_mw_clear_trans(nt->ndev, PIDX, num_mw); dma_free_coherent(dma_dev, mw->alloc_size, - mw->alloc_addr, mw->dma_addr); + mw->alloc_addr, mw->original_dma_addr); mw->xlat_size = 0; mw->buff_size = 0; mw->alloc_size = 0; @@ -802,6 +803,7 @@ static int ntb_alloc_mw_buffer(struct ntb_transport_mw *mw, return -ENOMEM; } virt_addr = alloc_addr; + mw->original_dma_addr = dma_addr; /* * we must ensure that the memory address allocated is BAR size |