RDMA/pvrdma: 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/r/YL3vSPK5DXTNvgdx@infradead.org

Link: https://lore.kernel.org/r/10c29cb45d14fb8ed89cf1308c4a9a7d445c52eb.1641717275.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c
index 105f3a1..343288b 100644 (file)
--- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c
@@ -811,12 +811,10 @@ static int pvrdma_pci_probe(struct pci_dev *pdev,
        }
 
        /* Enable 64-Bit DMA */
-       if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) != 0) {
-               ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
-               if (ret != 0) {
-                       dev_err(&pdev->dev, "dma_set_mask failed\n");
-                       goto err_free_resource;
-               }
+       ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+       if (ret) {
+               dev_err(&pdev->dev, "dma_set_mask failed\n");
+               goto err_free_resource;
        }
        dma_set_max_seg_size(&pdev->dev, UINT_MAX);
        pci_set_master(pdev);