1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/firmware_class/README b/Documentation/firmware_class/README
index e9fce78c4137..43fada989e65 100644
--- a/Documentation/firmware_class/README
+++ b/Documentation/firmware_class/README
@@ -119,3 +119,10 @@
    on the setup, so I think that the choice on what firmware to make
    persistent should be left to userspace.
 
+ about firmware cache:
+ --------------------
+ After firmware cache mechanism is introduced during system sleep,
+ request_firmware can be called safely inside device's suspend and
+ resume callback, and callers need't cache the firmware by
+ themselves any more for dealing with firmware loss during system
+ resume.