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usb: Missing dma_mask in uhci-platform.c when probed from device-tree

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Device-tree probed devices don't get a dev.dma_mask set. This patch
sets a default 32bit mask on platforms using devicetree.

Without this patch, arch-vt8500 cannot detect uhci attached devices.

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tony Prisk 2012-10-14 16:22:34 +13:00 committed by Greg Kroah-Hartman
parent c5211187f7
commit 09eeffb70c
1 changed files with 9 additions and 0 deletions
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9
drivers/usb/host/uhci-platform.c
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@ -60,6 +60,7 @@ static const struct hc_driver uhci_platform_hc_driver = {
.hub_control = uhci_hub_control,
};
static u64 platform_uhci_dma_mask = DMA_BIT_MASK(32);
static int __devinit uhci_hcd_platform_probe(struct platform_device *pdev)
{
@ -71,6 +72,14 @@ static int __devinit uhci_hcd_platform_probe(struct platform_device *pdev)
if (usb_disabled())
return -ENODEV;
/*
* Right now device-tree probed devices don't get dma_mask set.
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &platform_uhci_dma_mask;
hcd = usb_create_hcd(&uhci_platform_hc_driver, &pdev->dev,
pdev->name);
if (!hcd)