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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>
This commit is contained in:
Sarah Sharp 2010-03-16 12:59:24 -07:00 committed by Greg Kroah-Hartman
parent f09a15e6e6
commit 9ce669a892
1 changed files with 7 additions and 2 deletions
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9
drivers/usb/host/xhci-mem.c
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@ -566,8 +566,13 @@ static inline unsigned int xhci_get_endpoint_interval(struct usb_device *udev,
if (interval < 3) if (interval < 3)
interval = 3; interval = 3;
if ((1 << interval) != 8*ep->desc.bInterval) if ((1 << interval) != 8*ep->desc.bInterval)
dev_warn(&udev->dev, "ep %#x - rounding interval to %d microframes\n", dev_warn(&udev->dev,
ep->desc.bEndpointAddress, 1 << interval); "ep %#x - rounding interval"
" to %d microframes, "
"ep desc says %d microframes\n",
ep->desc.bEndpointAddress,
1 << interval,
8*ep->desc.bInterval);
} }
break; break;
default: default: