diff options
Diffstat (limited to 'drivers/usb/core/Kconfig')
| -rw-r--r-- | drivers/usb/core/Kconfig | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig index c3ba40dcbb16..98eab24a491d 100644 --- a/drivers/usb/core/Kconfig +++ b/drivers/usb/core/Kconfig @@ -86,6 +86,31 @@ config USB_SUSPEND If you are unsure about this, say N here. +config USB_PERSIST + bool "USB device persistence during system suspend (DANGEROUS)" + depends on USB && PM && EXPERIMENTAL + default n + help + + If you say Y here and enable the "power/persist" attribute + for a USB device, the device's data structures will remain + persistent across system suspend, even if the USB bus loses + power. (This includes hibernation, also known as swsusp or + suspend-to-disk.) The devices will reappear as if by magic + when the system wakes up, with no need to unmount USB + filesystems, rmmod host-controller drivers, or do anything + else. + + WARNING: This option can be dangerous! + + If a USB device is replaced by another of the same type while + the system is asleep, there's a good chance the kernel won't + detect the change. Likewise if the media in a USB storage + device is replaced. When this happens it's almost certain to + cause data corruption and maybe even crash your system. + + If you are unsure, say N here. + config USB_OTG bool depends on USB && EXPERIMENTAL |