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Commit 9ce669a8 authored by Sarah Sharp's avatar Sarah Sharp Committed by Greg Kroah-Hartman
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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: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent f09a15e6

drivers/usb/host/xhci-mem.c

+7 −2
Original line number Diff line number Diff line
@@ -566,8 +566,13 @@ static inline unsigned int xhci_get_endpoint_interval(struct usb_device *udev, 
			if (interval < 3)

				interval = 3;

			if ((1 << interval) != 8*ep->desc.bInterval)

				dev_warn(&udev->dev, "ep %#x - rounding interval to %d microframes\n",

						ep->desc.bEndpointAddress, 1 << interval);

				dev_warn(&udev->dev,

						"ep %#x - rounding interval"

						" to %d microframes, "

						"ep desc says %d microframes\n",

						ep->desc.bEndpointAddress,

						1 << interval,

						8*ep->desc.bInterval);

		}

		break;

	default: