linux-kernel - [PATCH 3.19 142/177] [media] rc: img-ir: fix error in parameters passed to irq

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Message-Id: <20150502190126.527011140@linuxfoundation.org>
Date:	Sat,  2 May 2015 21:02:44 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Sifan Naeem <sifan.naeem@...tec.com>,
	James Hogan <james.hogan@...tec.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
Subject: [PATCH 3.19 142/177] [media] rc: img-ir: fix error in parameters passed to irq_free()

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

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

From: Sifan Naeem <sifan.naeem@...tec.com>

commit 80ccf4ad06dc9d2f06a8347b2d309cdc959f72b3 upstream.

img_ir_remove() passes a pointer to the ISR function as the 2nd
parameter to irq_free() instead of a pointer to the device data
structure.
This issue causes unloading img-ir module to fail with the below
warning after building and loading img-ir as a module.

WARNING: CPU: 2 PID: 155 at ../kernel/irq/manage.c:1278
__free_irq+0xb4/0x214() Trying to free already-free IRQ 58
Modules linked in: img_ir(-)
CPU: 2 PID: 155 Comm: rmmod Not tainted 3.14.0 #55 ...
Call Trace:
...
[<8048d420>] __free_irq+0xb4/0x214
[<8048d6b4>] free_irq+0xac/0xf4
[<c009b130>] img_ir_remove+0x54/0xd4 [img_ir] [<8073ded0>]
platform_drv_remove+0x30/0x54 ...

Fixes: 160a8f8aec4d ("[media] rc: img-ir: add base driver")

Signed-off-by: Sifan Naeem <sifan.naeem@...tec.com>
Acked-by: James Hogan <james.hogan@...tec.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/rc/img-ir/img-ir-core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/rc/img-ir/img-ir-core.c
+++ b/drivers/media/rc/img-ir/img-ir-core.c
@@ -146,7 +146,7 @@ static int img_ir_remove(struct platform
 {
 	struct img_ir_priv *priv = platform_get_drvdata(pdev);
 
-	free_irq(priv->irq, img_ir_isr);
+	free_irq(priv->irq, priv);
 	img_ir_remove_hw(priv);
 	img_ir_remove_raw(priv);
 


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