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usb: Missing dma_mask in ehci-vt8500.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 arch-vt8500 when using devicetree.

Without this patch, arch-vt8500 cannot detect ehci 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 16:22:35 +13:00 committed by Greg Kroah-Hartman
parent 09eeffb70c
commit 6e1babb3ff
1 changed files with 10 additions and 0 deletions
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10
drivers/usb/host/ehci-vt8500.c
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@ -85,6 +85,8 @@ static const struct hc_driver vt8500_ehci_hc_driver = {
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};
static u64 vt8500_ehci_dma_mask = DMA_BIT_MASK(32);
static int vt8500_ehci_drv_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
@ -95,6 +97,14 @@ static int vt8500_ehci_drv_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 = &vt8500_ehci_dma_mask;
if (pdev->resource[1].flags != IORESOURCE_IRQ) {
pr_debug("resource[1] is not IORESOURCE_IRQ");
return -ENOMEM;