[PATCH 3.4 10/25] staging:iio:ad799x fix error_free_irq which was freeing an irq that may not have been requested

From: Greg Kroah-Hartman
Date: Thu Feb 20 2014 - 20:10:04 EST


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

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

From: Hartmut Knaack <knaack.h@xxxxxx>

commit 38408d056188be29a6c4e17f3703c796551bb330 upstream.

Only free an IRQ in error_free_irq, if it has been requested previously.

Signed-off-by: Hartmut Knaack <knaack.h@xxxxxx>
Acked-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/staging/iio/adc/ad799x_core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/staging/iio/adc/ad799x_core.c
+++ b/drivers/staging/iio/adc/ad799x_core.c
@@ -873,7 +873,8 @@ static int __devinit ad799x_probe(struct
return 0;

error_free_irq:
- free_irq(client->irq, indio_dev);
+ if (client->irq > 0)
+ free_irq(client->irq, indio_dev);
error_cleanup_ring:
ad799x_ring_cleanup(indio_dev);
error_disable_reg:


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