linux-kernel - [PATCH 4.18 118/235] mei: bus: fix hw module get/put balance

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Date:   Mon, 24 Sep 2018 13:51:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Georg Müller <georgmueller@....net>,
        Tomas Winkler <tomas.winkler@...el.com>
Subject: [PATCH 4.18 118/235] mei: bus: fix hw module get/put balance

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tomas Winkler <tomas.winkler@...el.com>

commit 69bf5313035926b0b6a6578de4f3168a8f5c19b8 upstream.

In case the device is not connected it doesn't 'get'
hw module and hence should not 'put' it on disable.

Cc: <stable@...r.kernel.org> 4.16+
Fixes:'commit 257355a44b99 ("mei: make module referencing local to the bus.c")'
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=200455
Tested-by: Georg Müller <georgmueller@....net>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/misc/mei/bus.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -600,9 +600,8 @@ int mei_cldev_disable(struct mei_cl_devi
 	if (err < 0)
 		dev_err(bus->dev, "Could not disconnect from the ME client\n");
 
-out:
 	mei_cl_bus_module_put(cldev);
-
+out:
 	/* Flush queues and remove any pending read */
 	mei_cl_flush_queues(cl, NULL);
 	mei_cl_unlink(cl);