ice: 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://lkml.org/lkml/2021/6/7/398

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 3081443..f46af3b 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -4459,8 +4459,6 @@ ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent)
 
        /* set up for high or low DMA */
        err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
-       if (err)
-               err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
        if (err) {
                dev_err(dev, "DMA configuration failed: 0x%x\n", err);
                return err;