May 20 2013

spi: topcliff-pch: Pass correct pointer to free_irq() 

Author: Lars-Peter Clausen <lars@metafoo.de>

free_irq() expects the same pointer that was passed to request_irq(), otherwise
the IRQ is not freed.

The issue was found using the following coccinelle script:


@r1@
type T;
T devid;
@@
request_irq(..., devid)

@r2@
type r1.T;
T devid;
position p;
@@
free_irq@p(..., devid)

@@
position p != r2.p;
@@
*free_irq@p(...)


Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Mark Brown 

---
 drivers/spi/spi-topcliff-pch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index 35f60bd..963e0f3 100644
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -1487,7 +1487,7 @@ static int pch_spi_pd_probe(struct platform_device *plat_dev)
 	return 0;
 
 err_spi_register_master:
-	free_irq(board_dat->pdev->irq, board_dat);
+	free_irq(board_dat->pdev->irq, data);
 err_request_irq:
 	pch_spi_free_resources(board_dat, data);
 err_spi_get_resources:

qlambert