[PATCH 3.19.y-ckt 037/210] [media] rc: sunxi-cir: Initialize the spinlock properly

[Kamal Mostafa]

3.19.8-ckt14 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Chen-Yu Tsai <wens at csie.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 at csie.org>
Acked-by: Hans de Goede <hdegoede at redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab at osg.samsung.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/media/rc/sunxi-cir.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c
index 340f7f5..147a558 100644
--- a/drivers/media/rc/sunxi-cir.c
+++ b/drivers/media/rc/sunxi-cir.c
@@ -154,6 +154,8 @@ static int sunxi_ir_probe(struct platform_device *pdev)
 	if (!ir)
 		return -ENOMEM;
 
+	spin_lock_init(&ir->ir_lock);
+
 	/* Clock */
 	ir->apb_clk = devm_clk_get(dev, "apb");
 	if (IS_ERR(ir->apb_clk)) {
-- 
1.9.1