kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

DMA-API: net: brocade/bna/bnad.c: fix 32-bit DMA mask handling

Browse source 
The fallback to 32-bit DMA mask is rather odd:
	if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
	    !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
		*using_dac = true;
	} 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)
				goto release_regions;
		}

This means we only try and set the coherent DMA mask if we failed to
set a 32-bit DMA mask, and only if both fail do we fail the driver.
Adjust this so that if either setting fails, we fail the driver - and
thereby end up properly setting both the DMA mask and the coherent
DMA mask in the fallback case.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2013-06-10 12:16:54 +01:00
parent 4aa806b771
commit 3e5480791e
1 changed files with 4 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

13
drivers/net/ethernet/brocade/bna/bnad.c
View file

@ -3300,17 +3300,12 @@ bnad_pci_init(struct bnad *bnad,
err = pci_request_regions(pdev, BNAD_NAME);
if (err)
goto disable_device;
if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
!dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
*using_dac = true;
} 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)
goto release_regions;
}
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err)
goto release_regions;
*using_dac = false;
}
pci_set_master(pdev);