Use dma_set_mask_and_coherent() instead of unrolling it with some dma_set_mask()+dma_set_coherent_mask(). Moreover, 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. That said, 'dma_flag' can only be 'true' after a successful dma_set_mask_and_coherent(). Simplify code and remove some dead code accordingly, including the now useless 'high_dma_flag' field in 'struct s2io_nic'. [1]: https://lkml.org/lkml/2021/6/7/398 Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx> --- drivers/net/ethernet/neterion/s2io.c | 18 +++--------------- drivers/net/ethernet/neterion/s2io.h | 1 - 2 files changed, 3 insertions(+), 16 deletions(-) diff --git a/drivers/net/ethernet/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c index d6ae44f164a9..6dd451adc331 100644 --- a/drivers/net/ethernet/neterion/s2io.c +++ b/drivers/net/ethernet/neterion/s2io.c @@ -7658,7 +7658,6 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre) struct s2io_nic *sp; struct net_device *dev; int i, j, ret; - int dma_flag = false; u32 mac_up, mac_down; u64 val64 = 0, tmp64 = 0; struct XENA_dev_config __iomem *bar0 = NULL; @@ -7680,17 +7679,8 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre) return ret; } - if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) { + if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) { DBG_PRINT(INIT_DBG, "%s: Using 64bit DMA\n", __func__); - dma_flag = true; - if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { - DBG_PRINT(ERR_DBG, - "Unable to obtain 64bit DMA for coherent allocations\n"); - pci_disable_device(pdev); - return -ENOMEM; - } - } else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) { - DBG_PRINT(INIT_DBG, "%s: Using 32bit DMA\n", __func__); } else { pci_disable_device(pdev); return -ENOMEM; @@ -7720,7 +7710,6 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre) sp = netdev_priv(dev); sp->dev = dev; sp->pdev = pdev; - sp->high_dma_flag = dma_flag; sp->device_enabled_once = false; if (rx_ring_mode == 1) sp->rxd_mode = RXD_MODE_1; @@ -7868,9 +7857,8 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre) NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM | NETIF_F_LRO; dev->features |= dev->hw_features | - NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; - if (sp->high_dma_flag == true) - dev->features |= NETIF_F_HIGHDMA; + NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | + NETIF_F_HIGHDMA; dev->watchdog_timeo = WATCH_DOG_TIMEOUT; INIT_WORK(&sp->rst_timer_task, s2io_restart_nic); INIT_WORK(&sp->set_link_task, s2io_set_link); diff --git a/drivers/net/ethernet/neterion/s2io.h b/drivers/net/ethernet/neterion/s2io.h index a4266d1544ab..cb7080eb5912 100644 --- a/drivers/net/ethernet/neterion/s2io.h +++ b/drivers/net/ethernet/neterion/s2io.h @@ -873,7 +873,6 @@ struct s2io_nic { struct mac_addr def_mac_addr[256]; struct net_device_stats stats; - int high_dma_flag; int device_enabled_once; char name[60]; -- 2.32.0
