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et131x: 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.

Moreover, dma_set_mask_and_coherent() returns 0 or -EIO, so the return
code of the function can be used directly. There is no need to 'rc = -EIO'
explicitly.

Simplify code and remove some dead code accordingly.

[1]: https://lkml.org/lkml/2021/6/7/398

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/b9aa46e7e5a5aa61f56aac5ea439930f41ad9946.1641726804.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Christophe JAILLET 2022-01-09 12:13:47 +01:00 committed by Jakub Kicinski
parent 942e78916f
commit 948f6b297f
1 changed files with 2 additions and 3 deletions
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5
drivers/net/ethernet/agere/et131x.c
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@ -3914,10 +3914,9 @@ static int et131x_pci_setup(struct pci_dev *pdev,
pci_set_master(pdev);
/* Check the DMA addressing support of this device */
if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) &&
dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) {
rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (rc) {
dev_err(&pdev->dev, "No usable DMA addressing method\n");
rc = -EIO;
goto err_release_res;
}