@@ -707,18 +707,10 @@ static int pt3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (ret < 0)
return ret;
- ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
- if (ret == 0)
- dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
- else {
- ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
- if (ret == 0)
- dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
- else {
- dev_err(&pdev->dev, "Failed to set DMA mask\n");
- return ret;
- }
- dev_info(&pdev->dev, "Use 32bit DMA\n");
+ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to set DMA mask\n");
+ return ret;
}
pt3 = devm_kzalloc(&pdev->dev, sizeof(*pt3), GFP_KERNEL);
Use dma_set_mask_and_coherent() instead of unrolling it with some dma_set_mask()+dma_set_coherent_mask(). Moreover, as stated in [1], dma_set_mask() with a 64-bit mask will never fail if dev->dma_mask is non-NULL. So, if it fails, the 32 bits case will also fail for the same reason. Simplify code and remove some dead code accordingly. [1]: https://lkml.org/lkml/2021/6/7/398 Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> --- drivers/media/pci/pt3/pt3.c | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-)