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From: Baolin Wang <>
Subject: [PATCH v2] usb: dwc3: host: Set the dma_ops for xhci device
Date: Mon,  6 Jun 2016 13:56:11 +0800	[thread overview]
Message-ID: <> (raw)

On ARM64 platform, it will set 'dummy_dma_ops' for device dma_ops if
it did not call 'arch_setup_dma_ops' at device creation time, that will
cause failure when setting the dma mask for device.

Thus this patch set the xhci device dma_ops from the parent device if
the xhci device dma_ops is 'dummy_dma_ops'.

Changes since v1:
 - Add CONFIG_ARM64 macro.

Signed-off-by: Baolin Wang <>
 drivers/usb/dwc3/host.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index c679f63..edb666d 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -32,6 +32,11 @@ int dwc3_host_init(struct dwc3 *dwc)
 		return -ENOMEM;
+#ifdef CONFIG_ARM64
+	if (get_dma_ops(&xhci->dev) == get_dma_ops(NULL))
+		xhci->dev.archdata.dma_ops = get_dma_ops(dwc->dev);
 	dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
 	xhci->dev.parent	= dwc->dev;

             reply	other threads:[~2016-06-06  5:56 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-06  5:56 Baolin Wang [this message]
2016-06-06 14:59 ` Felipe Balbi
2016-06-07  2:11   ` Baolin Wang
2016-06-08  8:18   ` Baolin Wang

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