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authorMing Lei <tom.leiming@gmail.com>2012-11-03 17:48:16 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-11-14 15:07:18 -0800
commit6a927857d890658789e6e54b058ef8527de8200a (patch)
tree96caa4c27cf460927601fae8490dffaeb6a421f4 /drivers/base
parent27602842060484b564cd725241b402b0bddfb830 (diff)
firmware loader: document firmware cache mechanism
This patch documents the firmware cache mechanism so that users of request_firmware() know that it can be called safely inside device's suspend and resume callback, and the device's firmware needn't be cached any more by individual driver itself to deal with firmware loss during system resume. Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/firmware_class.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 7888af7941a..d8146030918 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -988,6 +988,9 @@ err_put_dev:
* firmware image for this or any other device.
*
* Caller must hold the reference count of @device.
+ *
+ * The function can be called safely inside device's suspend and
+ * resume callback.
**/
int
request_firmware(const struct firmware **firmware_p, const char *name,