dmaengine: iot: Remove useless DMA-32 fallback configuration

As stated in [1], dma_set_mask() with a 64-bit mask never fails 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://lore.kernel.org/linux-kernel/YL3vSPK5DXTNvgdx@infradead.org/#t

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/1d0de79852a3551545fe896789a75b36e35db8e6.1642231987.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index 373b8da..5d707ff 100644 (file)
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -1365,8 +1365,6 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
        err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
        if (err)
-               err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
-       if (err)
                return err;
 
        device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]);