diff options
| author |   Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2022-01-02 21:27:39 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-01-03 10:42:58 +0000 |
| commit | 7120075ec41aed3bf377df7924d213f1c43f7462 (patch) | |
| tree | 1de66c5e3d214e66e1a46605a6c6aad4aad6cb45 | |
| parent | net: vertexcom: default to disabled on kbuild (diff) | |
| download | linux-7120075ec41aed3bf377df7924d213f1c43f7462.tar.xz linux-7120075ec41aed3bf377df7924d213f1c43f7462.zip | |
ethernet: s2io: Use dma_set_mask_and_coherent() and simplify code
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@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/neterion/s2io.c | 18 | ||||
| -rw-r--r-- | 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]; |