usb: add decriptor of persist fail for some morph usb devices
authorLan Tianyu <tianyu.lan@intel.com>
Fri, 3 Aug 2012 08:30:36 +0000 (16:30 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 10 Aug 2012 19:06:39 +0000 (12:06 -0700)
Some morph devices will morph after being reset and cause persist
to fail. This patch is to add descriptor about this in the
Document/usb/persist.txt

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Documentation/usb/persist.txt

index 074b159b77c20344aaa0a4abf7becc8603a2a065..35d70eda9ad627bf0eff7c1193f91fb451126e5b 100644 (file)
@@ -155,6 +155,9 @@ If the kernel gets fooled in this way, it's almost certain to cause
 data corruption and to crash your system.  You'll have no one to blame
 but yourself.
 
+For those devices with avoid_reset_quirk attribute being set, persist
+maybe fail because they may morph after reset.
+
 YOU HAVE BEEN WARNED!  USE AT YOUR OWN RISK!
 
 That having been said, most of the time there shouldn't be any trouble