Patch "auxdisplay: ks0108: fix refcount" has been added to the 3.14-stable tree

Patch "auxdisplay: ks0108: fix refcount" has been added to the 3.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    auxdisplay: ks0108: fix refcount

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     auxdisplay-ks0108-fix-refcount.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From bab383de3b84e584b0f09227151020b2a43dc34c Mon Sep 17 00:00:00 2001
From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Date: Mon, 20 Jul 2015 17:27:21 +0530
Subject: auxdisplay: ks0108: fix refcount

From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>

commit bab383de3b84e584b0f09227151020b2a43dc34c upstream.

parport_find_base() will implicitly do parport_get_port() which
increases the refcount. Then parport_register_device() will again
increment the refcount. But while unloading the module we are only
doing parport_unregister_device() decrementing the refcount only once.
We add an parport_put_port() to neutralize the effect of
parport_get_port().

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/auxdisplay/ks0108.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/auxdisplay/ks0108.c
+++ b/drivers/auxdisplay/ks0108.c
@@ -139,6 +139,7 @@ static int __init ks0108_init(void)
 
 	ks0108_pardevice = parport_register_device(ks0108_parport, KS0108_NAME,
 		NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
+	parport_put_port(ks0108_parport);
 	if (ks0108_pardevice == NULL) {
 		printk(KERN_ERR KS0108_NAME ": ERROR: "
 			"parport didn't register new device\n");


Patches currently in stable-queue which might be from sudipm.mukherjee@gmail.com are

queue-3.14/auxdisplay-ks0108-fix-refcount.patch