From 6e1babb3ff2651376f2e9843569fcb39cfe4686b Mon Sep 17 00:00:00 2001 From: Tony Prisk Date: Sun, 14 Oct 2012 16:22:35 +1300 Subject: usb: Missing dma_mask in ehci-vt8500.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 arch-vt8500 when using devicetree. Without this patch, arch-vt8500 cannot detect ehci attached devices. Signed-off-by: Tony Prisk Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-vt8500.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers') diff --git a/drivers/usb/host/ehci-vt8500.c b/drivers/usb/host/ehci-vt8500.c index 96722bfebc8..d3c9a3e397b 100644 --- a/drivers/usb/host/ehci-vt8500.c +++ b/drivers/usb/host/ehci-vt8500.c @@ -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; -- cgit v1.2.3-18-g5258