diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-06-10 15:24:50 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-09-22 00:00:59 +0400 |
| commit | dc4ff9bb7534ebd153f8441ec0e9190964ad8944 (patch) | |
| tree | 10b9a63e3a55df74f3f55e884c6dac3f4487f0c1 /drivers/net/ethernet/intel/igb | |
| parent | 718a39eb587e038f7ded076afcfd8d709879139f (diff) | |
| download | linux-dc4ff9bb7534ebd153f8441ec0e9190964ad8944.tar.xz | |
DMA-API: net: intel/igb: fix 32-bit DMA mask handling
The fallback to 32-bit DMA mask is rather odd:
err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
if (!err) {
err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
if (!err)
pci_using_dac = 1;
} else {
err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
if (err) {
err = dma_set_coherent_mask(&pdev->dev,
DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev,
"No usable DMA configuration, aborting\n");
goto err_dma;
}
}
}
This means we only set the coherent DMA mask in the fallback path if
the DMA mask set failed, which is silly. This fixes it to set the
coherent DMA mask only if dma_set_mask() succeeded, and to error out
if either fails.
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/net/ethernet/intel/igb')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_main.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 8cf44f2a8ccd..7579383c584d 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -2034,21 +2034,15 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) return err; pci_using_dac = 0; - err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (!err) { - err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); - if (!err) - pci_using_dac = 1; + pci_using_dac = 1; } else { - err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); if (err) { - err = dma_set_coherent_mask(&pdev->dev, - DMA_BIT_MASK(32)); - if (err) { - dev_err(&pdev->dev, - "No usable DMA configuration, aborting\n"); - goto err_dma; - } + dev_err(&pdev->dev, + "No usable DMA configuration, aborting\n"); + goto err_dma; } } |