From: govindarajulu.v Date: Wed, 4 Sep 2013 05:47:16 +0000 (+0530) Subject: driver/net: enic: Try DMA 64 first, then failover to DMA X-Git-Tag: upstream/snapshot3+hdmi~4422^2~13^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=624dbf55a359b1d8e335c046d4e57393e7d1916d;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git driver/net: enic: Try DMA 64 first, then failover to DMA In servers with more than 1.1 TB of RAM, the existing 40/32 bit DMA could cause failure as the DMA-able address could go outside the range addressable using 40/32 bits. The following patch first tried 64 bit DMA if possible, failover to 32 bit. Signed-off-by: Sujith Sankar Signed-off-by: Christian Benvenuti Signed-off-by: Govindarajulu Varadarajan Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c index 93898ba..7b756cf9 100644 --- a/drivers/net/ethernet/cisco/enic/enic_main.c +++ b/drivers/net/ethernet/cisco/enic/enic_main.c @@ -2080,11 +2080,11 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) pci_set_master(pdev); /* Query PCI controller on system for DMA addressing - * limitation for the device. Try 40-bit first, and + * limitation for the device. Try 64-bit first, and * fail to 32-bit. */ - err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40)); + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); if (err) { err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (err) { @@ -2098,10 +2098,10 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto err_out_release_regions; } } else { - err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)); + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); if (err) { dev_err(dev, "Unable to obtain %u-bit DMA " - "for consistent allocations, aborting\n", 40); + "for consistent allocations, aborting\n", 64); goto err_out_release_regions; } using_dac = 1;