linux-kernel - [PATCH 4.4 116/342] [media] rc: sunxi-cir: Initialize the spinlock properly

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Date:	Tue, 01 Mar 2016 23:54:22 +0000
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	<linux-kernel@...r.kernel.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<stable@...r.kernel.org>, Chen-Yu Tsai <wens@...e.org>,
	Hans de Goede <hdegoede@...hat.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
Subject: [PATCH 4.4 116/342] [media] rc: sunxi-cir: Initialize the spinlock properly

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

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

From: Chen-Yu Tsai <wens@...e.org>

commit 768acf46e1320d6c41ed1b7c4952bab41c1cde79 upstream.

The driver allocates the spinlock but fails to initialize it correctly.
The kernel reports a BUG indicating bad spinlock magic when spinlock
debugging is enabled.

Call spin_lock_init() on it to initialize it correctly.

Fixes: b4e3e59fb59c ("[media] rc: add sunxi-ir driver")

Signed-off-by: Chen-Yu Tsai <wens@...e.org>
Acked-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/rc/sunxi-cir.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/media/rc/sunxi-cir.c
+++ b/drivers/media/rc/sunxi-cir.c
@@ -153,6 +153,8 @@ static int sunxi_ir_probe(struct platfor
 	if (!ir)
 		return -ENOMEM;
 
+	spin_lock_init(&ir->ir_lock);
+
 	if (of_device_is_compatible(dn, "allwinner,sun5i-a13-ir"))
 		ir->fifo_size = 64;
 	else