driver core: fix documentation of request_firmware_nowait
request_firmware_nowait declares it can be called in non-sleep contexts,
but kthead_run called by request_firmware_nowait may sleep. So fix its
documentation and comment to make callers clear about it.
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/Documentation/firmware_class/README b/Documentation/firmware_class/README
index c3480aa..7eceaff 100644
--- a/Documentation/firmware_class/README
+++ b/Documentation/firmware_class/README
@@ -77,7 +77,8 @@
seconds for the whole load operation.
- request_firmware_nowait() is also provided for convenience in
- non-user contexts.
+ user contexts to request firmware asynchronously, but can't be called
+ in atomic contexts.
about in-kernel persistence:
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 2d296b7..2427702 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -617,8 +617,9 @@
* @cont: function will be called asynchronously when the firmware
* request is over.
*
- * Asynchronous variant of request_firmware() for contexts where
- * it is not possible to sleep.
+ * Asynchronous variant of request_firmware() for user contexts where
+ * it is not possible to sleep for long time. It can't be called
+ * in atomic contexts.
**/
int
request_firmware_nowait(