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IB/ipath: set up 32-bit DMA mask if 64-bit setup fails

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Some systems do not set up 64-bit maps on systems with 2GB or less of
memory installed, so we have to fall back to trying a 32-bit setup.

Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Bryan O'Sullivan
2006-04-24 14:22:58 -07:00
committed by Roland Dreier
parent 755e4ca4a9
commit 68dd43a162
1 changed files with 13 additions and 3 deletions
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10
drivers/infiniband/hw/ipath/ipath_driver.c
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@@ -417,11 +417,21 @@ static int __devinit ipath_init_one(struct pci_dev *pdev,
} }
ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK); ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
if (ret) {
/*
* if the 64 bit setup fails, try 32 bit. Some systems
* do not setup 64 bit maps on systems with 2GB or less
* memory installed.
*/
ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (ret) { if (ret) {
dev_info(&pdev->dev, "pci_set_dma_mask unit %u " dev_info(&pdev->dev, "pci_set_dma_mask unit %u "
"fails: %d\n", dd->ipath_unit, ret); "fails: %d\n", dd->ipath_unit, ret);
goto bail_regions; goto bail_regions;
} }
else
ipath_dbg("No 64bit DMA mask, used 32 bit mask\n");
}
pci_set_master(pdev); pci_set_master(pdev);