i2c: amd-mp2: 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>
Acked-by: Nehal Bakulchandra Shah <Nehal-bakulchandra.Shah@amd.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

diff --git a/drivers/i2c/busses/i2c-amd-mp2-pci.c b/drivers/i2c/busses/i2c-amd-mp2-pci.c
index adf0e8c..f57077a 100644 (file)
--- a/drivers/i2c/busses/i2c-amd-mp2-pci.c
+++ b/drivers/i2c/busses/i2c-amd-mp2-pci.c
@@ -308,11 +308,8 @@ static int amd_mp2_pci_init(struct amd_mp2_dev *privdata,
        pci_set_master(pci_dev);
 
        rc = dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(64));
-       if (rc) {
-               rc = dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32));
-               if (rc)
-                       goto err_dma_mask;
-       }
+       if (rc)
+               goto err_dma_mask;
 
        /* Set up intx irq */
        writel(0, privdata->mmio + AMD_P2C_MSG_INTEN);