diff options
author | Alan Stern <stern@rowland.harvard.edu> | 2013-03-28 00:14:19 +0400 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-28 22:06:27 +0400 |
commit | 0aa2832dd0d9d8609fd8f15139bc7572541a1215 (patch) | |
tree | 9537cc80217eca1614ca988a87b34170b8dbcc8f /include/linux/usb.h | |
parent | e9e88fb7bca9f527ccdf4166a240a9023ba6ee73 (diff) | |
download | linux-0aa2832dd0d9d8609fd8f15139bc7572541a1215.tar.xz |
USB: use "global suspend" for system sleep on USB-2 buses
This patch (as1674) speeds up system sleep transitions by not
suspending each individual device on a USB-1.1 or USB-2 bus. The
devices will automatically go into suspend when their root hubs are
suspended (i.e., stop sending out Start-Of-Frame packets) -- this is
what the USB spec calls "global suspend".
Since this is what we do already when CONFIG_USB_SUSPEND isn't
enabled, it shouldn't cause any problems.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/usb.h')
0 files changed, 0 insertions, 0 deletions