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authorSarah Sharp <sarah.a.sharp@intel.com>2007-10-03 14:56:03 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-12 14:55:30 -0700
commit4d59d8a11383ebf0e0260ee481a4e766959fd7d9 (patch)
tree240cf81cc56896a69c1467b7c8bc4f3f4022c3fd /drivers/usb/core/usb.c
parent437f375f262417b484f28007c3e8d21bd01d0e01 (diff)
USB: Export URB statistics for powertop
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>
Diffstat (limited to 'drivers/usb/core/usb.c')
-rw-r--r--drivers/usb/core/usb.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 8121edbd149..c99938d5f78 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -266,6 +266,7 @@ usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus, unsigned port1)
dev->dev.dma_mask = bus->controller->dma_mask;
set_dev_node(&dev->dev, dev_to_node(bus->controller));
dev->state = USB_STATE_ATTACHED;
+ atomic_set(&dev->urbnum, 0);
INIT_LIST_HEAD(&dev->ep0.urb_list);
dev->ep0.desc.bLength = USB_DT_ENDPOINT_SIZE;