Pull throttle into release branch

[linux-2.6-omap-h63xx.git] / drivers / usb / core / Kconfig

diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index 346fc030c929ae172b6658df8f1a2b54113e1ac3..97b09f282705bb4c4249e733d89ea3ca43876cd2 100644 (file)
--- 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