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virtio-mmio: add error check for platform_get_irq

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in vm_find_vqs() irq has a wrong type
so, in case of no IRQ resource defined,
wrong parameter will be passed to request_irq()

Signed-off-by: Ihor Matushchak <ihor.matushchak@foobox.net>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Ivan T. Ivanov <iivanov.xz@gmail.com>
This commit is contained in:
Ihor Matushchak 2019-07-02 17:48:18 +03:00 committed by Michael S. Tsirkin
parent 211f70ff1d
commit 5e663f0410
1 changed files with 6 additions and 1 deletions
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7
drivers/virtio/virtio_mmio.c
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@ -463,9 +463,14 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct irq_affinity *desc)
{
struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
unsigned int irq = platform_get_irq(vm_dev->pdev, 0);
int irq = platform_get_irq(vm_dev->pdev, 0);
int i, err, queue_idx = 0;
if (irq < 0) {
dev_err(&vdev->dev, "Cannot get IRQ resource\n");
return irq;
}
err = request_irq(irq, vm_interrupt, IRQF_SHARED,
dev_name(&vdev->dev), vm_dev);
if (err)