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| author |   Alan Stern <stern@rowland.harvard.edu> | 2013-03-27 16:14:19 -0400 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-28 11:06:27 -0700 |
| commit | 0aa2832dd0d9d8609fd8f15139bc7572541a1215 (patch) | |
| tree | 9537cc80217eca1614ca988a87b34170b8dbcc8f /include/linux/usb | |
| parent | USB: avoid error messages when a device is disconnected (diff) | |
| download | linux-dev-0aa2832dd0d9d8609fd8f15139bc7572541a1215.tar.xz linux-dev-0aa2832dd0d9d8609fd8f15139bc7572541a1215.zip | |
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')
0 files changed, 0 insertions, 0 deletions