| Message ID | 3011689e8c77d49d7e44509d5a8241320ec408c5.1641754134.git.christophe.jaillet@wanadoo.fr (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 0959a82ab3e569509cbab111564bea1c916bb204 |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net/qla3xxx: Remove useless DMA-32 fallback configuration | expand |
Hello: This patch was applied to netdev/net-next.git (master) by Jakub Kicinski <kuba@kernel.org>: On Sun, 9 Jan 2022 19:49:09 +0100 you wrote: > 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. > > So, if dma_set_mask_and_coherent() succeeds, 'pci_using_dac' is known to be > 1. > > [...] Here is the summary with links: - net/qla3xxx: Remove useless DMA-32 fallback configuration https://git.kernel.org/netdev/net-next/c/0959a82ab3e5 You are awesome, thank you!
diff --git a/drivers/net/ethernet/qlogic/qla3xxx.c b/drivers/net/ethernet/qlogic/qla3xxx.c index 71523d747e93..b30589a135c2 100644 --- a/drivers/net/ethernet/qlogic/qla3xxx.c +++ b/drivers/net/ethernet/qlogic/qla3xxx.c @@ -3750,7 +3750,7 @@ static int ql3xxx_probe(struct pci_dev *pdev, struct net_device *ndev = NULL; struct ql3_adapter *qdev = NULL; static int cards_found; - int pci_using_dac, err; + int err; err = pci_enable_device(pdev); if (err) { @@ -3766,11 +3766,7 @@ static int ql3xxx_probe(struct pci_dev *pdev, pci_set_master(pdev); - if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) - pci_using_dac = 1; - else if (!(err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)))) - pci_using_dac = 0; - + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (err) { pr_err("%s no usable DMA configuration\n", pci_name(pdev)); goto err_out_free_regions; @@ -3797,8 +3793,7 @@ static int ql3xxx_probe(struct pci_dev *pdev, qdev->msg_enable = netif_msg_init(debug, default_msg); - if (pci_using_dac) - ndev->features |= NETIF_F_HIGHDMA; + ndev->features |= NETIF_F_HIGHDMA; if (qdev->device_id == QL3032_DEVICE_ID) ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
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. So, if dma_set_mask_and_coherent() succeeds, 'pci_using_dac' is known to be 1. 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> --- This patch was not part of the 1st serie I've sent. So there is no Reviewed-by tag. --- drivers/net/ethernet/qlogic/qla3xxx.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-)