[PATCH 4.2.y-ckt 052/268] [media] rc: sunxi-cir: Initialize the spinlock properly

From: Kamal Mostafa
Date: Wed Jan 27 2016 - 16:51:53 EST


4.2.8-ckt3 -stable review patch. If anyone has any objections, please let me know.

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

From: Chen-Yu Tsai <wens@xxxxxxxx>

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@xxxxxxxx>
Acked-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
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 7830aef..40f7768 100644
--- a/drivers/media/rc/sunxi-cir.c
+++ b/drivers/media/rc/sunxi-cir.c
@@ -153,6 +153,8 @@ static int sunxi_ir_probe(struct platform_device *pdev)
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
--
1.9.1