xhci: remove WARN_ON if dma mask is not set for platform devices

The warn on is a bit too much, we will anyway set the dma mask if not set
previously.

The main reason for this fix is that 4.10-rc1  has a dwc3 change that
pass a parent sysdev dev pointer instead of setting the dma mask of
its xhci platform device. xhci platform driver can then get more
attributes from the sysdev than just the dma mask.

The usb core and xhci changes are not yet in 4.10, and a fix like
this was preferred instead of taking those big changes this late in
the rc-cycle.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index ddfab301e36658adccde76b9a47141b39a3508c7..e5834dd9bcdedb246a51be1b35fa70c9ed920b61 100644 (file)
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -165,7 +165,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
                return -ENODEV;
 
        /* Try to set 64-bit DMA first */
-       if (WARN_ON(!pdev->dev.dma_mask))
+       if (!pdev->dev.dma_mask)
                /* Platform did not initialize dma_mask */
                ret = dma_coerce_mask_and_coherent(&pdev->dev,
                                                   DMA_BIT_MASK(64));