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

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>

diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c
index b78e69e0e52a291047e72c222530a1500e4ac003..45ce6e2214b3227c275c92d9bd8ece76bb478097 100644 (file)
--- a/drivers/net/ethernet/brocade/bna/bnad.c
+++ b/drivers/net/ethernet/brocade/bna/bnad.c
@@ -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);