From f0ed939b6ab63f6ed9f9ff454f33997de10d8ae7 Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Sat, 1 Jan 2022 22:28:51 +0100 Subject: media: pt3: Use dma_set_mask_and_coherent() and simplify code 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 Acked-by: Akihiro Tsukada Signed-off-by: Hans Verkuil --- drivers/media/pci/pt3/pt3.c | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-) (limited to 'drivers/media') diff --git a/drivers/media/pci/pt3/pt3.c b/drivers/media/pci/pt3/pt3.c index f6deac85962e..246f73b8a9e7 100644 --- a/drivers/media/pci/pt3/pt3.c +++ b/drivers/media/pci/pt3/pt3.c @@ -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); -- cgit v1.2.3