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USB: xhci: Make endpoint interval debugging clearer.
The xHCI hardware can only handle polling intervals that are a power of two. When we add a new endpoint during a bandwidth allocation, and the polling interval is rounded down to a power of two, print the original polling interval in the endpoint descriptor. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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1 changed files with 7 additions and 2 deletions
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@ -566,8 +566,13 @@ static inline unsigned int xhci_get_endpoint_interval(struct usb_device *udev,
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if (interval < 3)
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interval = 3;
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if ((1 << interval) != 8*ep->desc.bInterval)
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dev_warn(&udev->dev, "ep %#x - rounding interval to %d microframes\n",
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ep->desc.bEndpointAddress, 1 << interval);
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dev_warn(&udev->dev,
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"ep %#x - rounding interval"
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" to %d microframes, "
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"ep desc says %d microframes\n",
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ep->desc.bEndpointAddress,
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1 << interval,
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8*ep->desc.bInterval);
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}
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break;
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default:
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