This is a note to let you know that I've just added the patch titled
auxdisplay: ks0108: fix refcount
to my char-misc git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
in the char-misc-testing branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will be merged to the char-misc-next branch sometime soon,
after it passes testing, and the merge window is open.
If you have any questions about this process, please let me know.
>From bab383de3b84e584b0f09227151020b2a43dc34c Mon Sep 17 00:00:00 2001
From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
Date: Mon, 20 Jul 2015 17:27:21 +0530
Subject: auxdisplay: ks0108: fix refcount
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().
Cc: <stable@xxxxxxxxxxxxxxx> # 2.6.32+
Signed-off-by: Sudip Mukherjee <sudip@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/auxdisplay/ks0108.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/auxdisplay/ks0108.c b/drivers/auxdisplay/ks0108.c
index 5b93852392b8..0d752851a1ee 100644
--- 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");
--
2.5.0
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