[PATCH 10/19] usb: host: ehci-orion: fix the probe without DT

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

From: Josef Bacik <josef@toxicpanda.com>

The Orion5x, MV78xx0 and Dove board files register the controllers as
platform devices called "orion-ehci" (arch/arm/plat-orion/common.c),
which are bound by name. of_device_get_match_data() returns NULL for
them, and ehci_orion_drv_probe() dereferences it to get the DMA mask.

Use the 32 bit mask, as before, if there is no match data.

Fixes: c63fe1cc7093 ("usb: host: Add ac5 to EHCI Orion")
Cc: Elad Nachman <enachman@marvell.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/ehci-orion.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index eaaa49712a8c..2071c3d6e582 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -218,7 +218,7 @@ static int ehci_orion_drv_probe(struct platform_device *pdev)
 	int irq, err;
 	enum orion_ehci_phy_ver phy_version;
 	struct orion_ehci_hcd *priv;
-	u64 *dma_mask_ptr;
+	const u64 *dma_mask_ptr;
 
 	if (usb_disabled())
 		return -ENODEV;
@@ -236,7 +236,9 @@ static int ehci_orion_drv_probe(struct platform_device *pdev)
 	 * set. Since shared usb code relies on it, set it here for
 	 * now. Once we have dma capability bindings this can go away.
 	 */
-	dma_mask_ptr = (u64 *)of_device_get_match_data(&pdev->dev);
+	dma_mask_ptr = of_device_get_match_data(&pdev->dev);
+	if (!dma_mask_ptr)
+		dma_mask_ptr = &dma_mask_orion;
 	err = dma_coerce_mask_and_coherent(&pdev->dev, *dma_mask_ptr);
 	if (err)
 		goto err;

-- 
2.56.0