On Thu, Apr 25, 2013 at 09:08:27AM -0700, Julius Werner wrote: > The current EHCI code sleeps a flat 110ms in the resume path if there > was a USB 1.1 device connected to its companion controller during > suspend, waiting for the device to reappear and reset so that it can be > handed back to the companion. This is necessary if the device uses > persist, so that the companion controller can actually see it during its > own resume path. > > However, if the device doesn't use persist, this is entirely > unnecessary. We might just as well ignore it and have the normal device > detection/reset/handoff code handle it asynchronously when it eventually > shows up. As USB 1.1 devices are almost exclusively HIDs these days (for > which persist has no value), this can allow distros to shave another > tenth of a second off their resume time. > > In order to enable this optimization, the patch also adds a new > usb_for_each_dev() iterator that is exported by the USB core and wraps > bus_for_each_dev() with the logic to differentiate between struct > usb_device and struct usb_interface on the usb_bus_type bus. > > Signed-off-by: Julius Werner <jwerner@xxxxxxxxxxxx> > Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > --- > drivers/usb/core/usb.c | 33 +++++++++++++++++++++++++++++++++ > drivers/usb/host/ehci-hub.c | 17 +++++++++++++++++ > include/linux/usb.h | 1 + > 3 files changed, 51 insertions(+) This patch is corrupted somehow, but I can't figure out how. I'm getting the error: checking file drivers/usb/core/usb.c checking file drivers/usb/host/ehci-hub.c patch: **** malformed patch at line 164: @@ -56,6 +63,16 @@ static void ehci_handover_companion_ports(struct ehci_hcd *ehci) when trying to apply it. git also doesn't like it. Care to fix this up and resend it so I can apply it? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
