linux-kernel - [PATCH] HID: hidraw: fix power sequence when closing device

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Message-ID: <20170920013746.GA33367@dtor-ws>
Date:   Tue, 19 Sep 2017 18:37:46 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Jiri Kosina <jikos@...nel.org>
Cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Benson Leung <bleung@...omium.org>,
        Oliver Neukum <oneukum@...e.com>,
        Guenter Roeck <groeck@...omium.org>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] HID: hidraw: fix power sequence when closing device

We should not try to bring HID device out of full power state before
calling hid_hw_close(), so that transport driver operates on powered up
device (making this inverse of the opening sequence).

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/hid/hidraw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index ec530454e6f6..5fbe0f81ab2e 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -337,8 +337,8 @@ static void drop_ref(struct hidraw *hidraw, int exists_bit)
 			kfree(hidraw);
 		} else {
 			/* close device for last reader */
-			hid_hw_power(hidraw->hid, PM_HINT_NORMAL);
 			hid_hw_close(hidraw->hid);
+			hid_hw_power(hidraw->hid, PM_HINT_NORMAL);
 		}
 	}
 }
-- 
2.14.1.821.g8fa685d3b7-goog


-- 
Dmitry