dmaengine: idxd: 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>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/009c80294dba72858cd8a6ed2ed81041df1b1e82.1642231430.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 08a5f43..993a5dc 100644 (file)
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -605,8 +605,6 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
        dev_dbg(dev, "Set DMA masks\n");
        rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
        if (rc)
-               rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
-       if (rc)
                goto err;
 
        dev_dbg(dev, "Set PCI master\n");