Commit 632fefaf authored Dec 20, 2013 by Aaro Koskinen Committed by Greg Kroah-Hartman Dec 20, 2013

uio: fix devm_request_irq usage



Commit e6789cd3 (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>
Cc: stable <stable@vger.kernel.org> # 3.13
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 65861ab4

drivers/uio/uio.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -847,7 +847,7 @@ int __uio_register_device(struct module *owner,
		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;