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| author | Ruizhe Zhou <zhouruizhe@resnics.com> | 2026-08-12 11:36:47 +0800 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2026-09-01 09:33:58 -0400 |
| commit | 08a978db86e877172b8a2b9ae6fd7823ecbf72bb (patch) | |
| tree | 09ea9a20a0a9af1743d881cab2418b8befb6e798 | |
| parent | 901c15a2099d43538173fd82ba5efb55ab842e75 (diff) | |
| download | linux-next-08a978db86e877172b8a2b9ae6fd7823ecbf72bb.tar.gz linux-next-08a978db86e877172b8a2b9ae6fd7823ecbf72bb.zip | |
RDMA/mlx5: Remove obsolete 32-bit DMA mask fallback
The DMA API guarantees support for masks of 32 bits or wider and
explicitly identifies retrying a 32-bit mask after a 64-bit request as
incorrect:
https://docs.kernel.org/core-api/dma-api-howto.html#dma-addressing-capabilities
Remove the obsolete fallback from data direct while retaining the error
check so that a genuine DMA setup failure is still reported and aborts
initialization.
Signed-off-by: Ruizhe Zhou <zhouruizhe@resnics.com>
Link: https://patch.msgid.link/20260812033647.2281547-3-zhouruizhe@resnics.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
| -rw-r--r-- | drivers/infiniband/hw/mlx5/data_direct.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/infiniband/hw/mlx5/data_direct.c b/drivers/infiniband/hw/mlx5/data_direct.c index d57484245c38..93a56ee2c4ef 100644 --- a/drivers/infiniband/hw/mlx5/data_direct.c +++ b/drivers/infiniband/hw/mlx5/data_direct.c @@ -65,13 +65,9 @@ static int mlx5_data_direct_set_dma_caps(struct pci_dev *pdev) err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (err) { - dev_warn(&pdev->dev, - "Warning: couldn't set 64-bit PCI DMA mask, err=%d\n", err); - err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); - if (err) { - dev_err(&pdev->dev, "Can't set PCI DMA mask, err=%d\n", err); - return err; - } + dev_err(&pdev->dev, + "Can't set 64-bit PCI DMA mask, err=%d\n", err); + return err; } dma_set_max_seg_size(&pdev->dev, SZ_2G); |