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IB/mthca: Remove useless DMA-32 fallback configuration 

As stated in [1], dma_set_mask() with a 64-bit mask never fails if
dev->dma_mask is non-NULL.

So, if it fails, the 32 bits case will also fail for the same reason.

Simplify code and remove some dead code accordingly.

[1]: https://lore.kernel.org/r/YL3vSPK5DXTNvgdx@infradead.org

Link: https://lore.kernel.org/r/03c66fe5c2a81dbb29349ebf9af631e5ea216ec4.1642232675.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Christophe JAILLET 2022-01-15 08:45:05 +01:00 committed by Jason Gunthorpe
parent e783362eb5
commit 667da76b1c
1 changed files with 2 additions and 6 deletions
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8
drivers/infiniband/hw/mthca/mthca_main.c
View File

@ -939,12 +939,8 @@ static int __mthca_init_one(struct pci_dev *pdev, int hca_type)
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.\n");
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n");
goto err_free_res;
}
dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n");
goto err_free_res;
}
/* We can handle large RDMA requests, so allow larger segments. */