staging:iio:ad799x fix error_free_irq which was freeing an irq that may not have...

commit 38408d056188be29a6c4e17f3703c796551bb330 upstream.

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

Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c
index a845866..0cad467 100644 (file)
--- 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 i2c_client *client,
        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: