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authorBryan O'Sullivan <bos@pathscale.com>2006-04-24 14:22:58 -0700
committerRoland Dreier <rolandd@cisco.com>2006-05-01 12:14:12 -0700
commit68dd43a162b43218d2e5ac1d139c1d53da965f54 (patch)
tree5c21df89d9b154b287cc340a5ac4be97d1a61e3f /drivers
parent755e4ca4a9885b79a14169ab5b615920eb38a32a (diff)
IB/ipath: set up 32-bit DMA mask if 64-bit setup fails
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/hw/ipath/ipath_driver.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_driver.c b/drivers/infiniband/hw/ipath/ipath_driver.c
index e7617c3982e..7ff95b72d1f 100644
--- a/drivers/infiniband/hw/ipath/ipath_driver.c
+++ b/drivers/infiniband/hw/ipath/ipath_driver.c
@@ -418,9 +418,19 @@ static int __devinit ipath_init_one(struct pci_dev *pdev,
ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
if (ret) {
- dev_info(&pdev->dev, "pci_set_dma_mask unit %u "
- "fails: %d\n", dd->ipath_unit, ret);
- goto bail_regions;
+ /*
+ * 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) {
+ dev_info(&pdev->dev, "pci_set_dma_mask unit %u "
+ "fails: %d\n", dd->ipath_unit, ret);
+ goto bail_regions;
+ }
+ else
+ ipath_dbg("No 64bit DMA mask, used 32 bit mask\n");
}
pci_set_master(pdev);