1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/hid/hid-google-hammer.c b/drivers/hid/hid-google-hammer.c
index 6486469ce0f6..7b8e17b03cb8 100644
--- a/drivers/hid/hid-google-hammer.c
+++ b/drivers/hid/hid-google-hammer.c
@@ -41,6 +41,16 @@ static int hammer_kbd_brightness_set_blocking(struct led_classdev *cdev,
         led->buf[0] = 0;
         led->buf[1] = br;
 
+        /*
+         * Request USB HID device to be in Full On mode, so that sending
+         * hardware output report and hardware raw request won't fail.
+         */
+        ret = hid_hw_power(led->hdev, PM_HINT_FULLON);
+        if (ret < 0) {
+                hid_err(led->hdev, "failed: device not resumed %d\n", ret);
+                return ret;
+        }
+
         ret = hid_hw_output_report(led->hdev, led->buf, sizeof(led->buf));
         if (ret == -ENOSYS)
                 ret = hid_hw_raw_request(led->hdev, 0, led->buf,
@@ -50,6 +60,10 @@ static int hammer_kbd_brightness_set_blocking(struct led_classdev *cdev,
         if (ret < 0)
                 hid_err(led->hdev, "failed to set keyboard backlight: %d\n",
                         ret);
+
+        /* Request USB HID device back to Normal Mode. */
+        hid_hw_power(led->hdev, PM_HINT_NORMAL);
+
         return ret;
 }