As stated in [1], dma_set_mask() with a 64-bit mask will never fail if dev->dma_mask is non-NULL. So, if it fails, the 32 bits case will also fail for the same reason. If dma_set_mask_and_coherent() succeeds, 'ap->pci_using_dac' is known to be 1. So 'pci_using_dac' can be removed from the 'struct ace_private'. Simplify code and remove some dead code accordingly. [1]: https://lkml.org/lkml/2021/6/7/398 Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx> --- drivers/net/ethernet/alteon/acenic.c | 9 ++------- drivers/net/ethernet/alteon/acenic.h | 1 - 2 files changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/alteon/acenic.c b/drivers/net/ethernet/alteon/acenic.c index 732da15a3827..22fe98555b24 100644 --- a/drivers/net/ethernet/alteon/acenic.c +++ b/drivers/net/ethernet/alteon/acenic.c @@ -589,8 +589,7 @@ static int acenic_probe_one(struct pci_dev *pdev, } ap->name = dev->name; - if (ap->pci_using_dac) - dev->features |= NETIF_F_HIGHDMA; + dev->features |= NETIF_F_HIGHDMA; pci_set_drvdata(pdev, dev); @@ -1130,11 +1129,7 @@ static int ace_init(struct net_device *dev) /* * Configure DMA attributes. */ - if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) { - ap->pci_using_dac = 1; - } else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) { - ap->pci_using_dac = 0; - } else { + if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) { ecode = -ENODEV; goto init_error; } diff --git a/drivers/net/ethernet/alteon/acenic.h b/drivers/net/ethernet/alteon/acenic.h index 265fa601a258..ca5ce0cbbad1 100644 --- a/drivers/net/ethernet/alteon/acenic.h +++ b/drivers/net/ethernet/alteon/acenic.h @@ -692,7 +692,6 @@ struct ace_private __attribute__ ((aligned (SMP_CACHE_BYTES))); u32 last_tx, last_std_rx, last_mini_rx; #endif - int pci_using_dac; u8 firmware_major; u8 firmware_minor; u8 firmware_fix; -- 2.32.0
