[PATCH 3.13 064/140] uio: fix devm_request_irq usage

Greg Kroah-Hartman
2014-02-04T21:39:10Z

From: Aaro Koskinen <aaro.koskinen@nsn.com>

commit 632fefaf1fff7c344191c363e08a43cf006fe60e upstream.

Commit e6789cd3dfb553077606ccafeb05e0043f072481 (uio: Simplify uio error
path by using devres functions) converted uio to use devm_request_irq().
This introduced a change in behaviour since the IRQ is associated with
the parent device instead of the created UIO device. The IRQ will remain
active after uio_unregister_device() is called, and some drivers will
crash because of this. The patch fixes this.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nsn.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/uio/uio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -847,7 +847,7 @@ int __uio_register_device(struct module
info->uio_dev = idev;

if (info->irq && (info->irq != UIO_IRQ_CUSTOM)) {
- ret = devm_request_irq(parent, info->irq, uio_interrupt,
+ ret = devm_request_irq(idev->dev, info->irq, uio_interrupt,
info->irq_flags, info->name, idev);
if (ret)
goto err_request_irq;