Messages in this thread Patch in this message | | | From | Lars-Peter Clausen <> | Subject | [PATCH 3/7] input: twl4030_keypad: Pass correct pointer to free_irq() | Date | Mon, 20 May 2013 16:51:22 +0200 |
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free_irq() expects the same pointer that was passed to request_threaded_irq(), otherwise the IRQ is not freed.
The issue was found using the following coccinelle script:
<smpl> @r1@ type T; T devid; @@ request_threaded_irq(..., devid)
@r2@ type r1.T; T devid; position p; @@ free_irq@p(..., devid)
@@ position p != r2.p; @@ *free_irq@p(...) </smpl>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> --- drivers/input/keyboard/twl4030_keypad.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/input/keyboard/twl4030_keypad.c b/drivers/input/keyboard/twl4030_keypad.c index f05ee1db..d2d178c 100644 --- a/drivers/input/keyboard/twl4030_keypad.c +++ b/drivers/input/keyboard/twl4030_keypad.c @@ -422,7 +422,7 @@ static int twl4030_kp_probe(struct platform_device *pdev) err3: /* mask all events - we don't care about the result */ (void) twl4030_kpwrite_u8(kp, 0xff, KEYP_IMR1); - free_irq(kp->irq, NULL); + free_irq(kp->irq, kp); err2: input_unregister_device(input); input = NULL; -- 1.8.0
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