linux-kernel - [PATCH 3/4] usb: dwc3: core: only setting the dma

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Date:	Wed, 20 Aug 2014 14:55:27 +0300
From:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:	Felipe Balbi <balbi@...com>
Cc:	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Alan Cox <alan@...ux.intel.com>, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: [PATCH 3/4] usb: dwc3: core: only setting the dma_mask when needed

If the probe drivers have already set the dma_mask, not
replacing the value.

Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
---
 drivers/usb/dwc3/core.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index b769c1f..3f307f6 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -711,9 +711,11 @@ static int dwc3_probe(struct platform_device *pdev)
 	spin_lock_init(&dwc->lock);
 	platform_set_drvdata(pdev, dwc);
 
-	dev->dma_mask	= dev->parent->dma_mask;
-	dev->dma_parms	= dev->parent->dma_parms;
-	dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask);
+	if (!dev->dma_mask) {
+		dev->dma_mask = dev->parent->dma_mask;
+		dev->dma_parms = dev->parent->dma_parms;
+		dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask);
+	}
 
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
-- 
2.1.0

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