From 4d561a900c3907ea5bcc9bf8fbce27fd1c2fe5be Mon Sep 17 00:00:00 2001
From: Mathias Nyman <mathias.nyman@linux.intel.com>
Date: Fri, 20 Jan 2017 15:38:24 +0200
Subject: [PATCH 296/299] 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>
(cherry picked from commit 488dc164914ff5ce5e913abd32048d28fc0d06b8)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
 drivers/usb/host/xhci-plat.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -165,7 +165,7 @@ static int xhci_plat_probe(struct platfo
 		return irq;
 
 	/* 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));