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USB: Export URB statistics for powertop

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powertop currently tracks interrupts generated by uhci, ehci, and ohci,
but it has no way of telling which USB device to blame USB bus activity on.
This patch exports the number of URBs that are submitted for a given device.
Cat the file 'urbnum' in /sys/bus/usb/devices/.../

Signed-off-by: Sarah Sharp <sarah.a.sharp@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sarah Sharp 2007-10-03 14:56:03 -07:00 • committed by Greg Kroah-Hartman
parent 437f375f26
commit 4d59d8a113
4 changed files with 15 additions and 0 deletions
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1
include/linux/usb.h
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@ -415,6 +415,7 @@ struct usb_device {
int pm_usage_cnt; /* usage counter for autosuspend */
u32 quirks; /* quirks of the whole device */
atomic_t urbnum; /* number of URBs submitted for the whole device */
#ifdef CONFIG_PM
struct delayed_work autosuspend; /* for delayed autosuspends */