From: Tony Prisk Date: Sun, 14 Oct 2012 03:22:34 +0000 (+1300) Subject: usb: Missing dma_mask in uhci-platform.c when probed from device-tree X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=09eeffb70c086692064f4224490d1cd2ffe43bdd;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git usb: Missing dma_mask in uhci-platform.c when probed from device-tree 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/uhci-platform.c b/drivers/usb/host/uhci-platform.c index e4780491df4a..68ebf20e1519 100644 --- a/drivers/usb/host/uhci-platform.c +++ b/drivers/usb/host/uhci-platform.c @@ -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)