diff options
| author | govindarajulu.v <govindarajulu90@gmail.com> | 2013-09-04 11:17:16 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-09-05 12:39:33 -0400 |
| commit | 624dbf55a359b1d8e335c046d4e57393e7d1916d (patch) | |
| tree | 3861fbc5eaa51a57851cb8ef91953f9077543f92 /drivers | |
| parent | bf751ba802fe57f4f3aa5555e1446387912bef9e (diff) | |
| download | linux-624dbf55a359b1d8e335c046d4e57393e7d1916d.tar.bz2 | |
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 <ssujith@cisco.com>
Signed-off-by: Christian Benvenuti <benve@cisco.com>
Signed-off-by: Govindarajulu Varadarajan <govindarajulu90@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/enic_main.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c index 93898baa25db..7b756cf9474a 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; |