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authorIhor Matushchak <ihor.matushchak@foobox.net>2019-07-02 17:48:18 +0300
committerMichael S. Tsirkin <mst@redhat.com>2019-07-11 16:22:29 -0400
commit5e663f0410fa2f355042209154029842ba1abd43 (patch)
tree7e977bbddad567428fc006bb0bb18a011e696792 /drivers/virtio/virtio_mmio.c
parent211f70ff1daa3b3bb877f0f6fa85a42ef50f8341 (diff)
downloadlinux-5e663f0410fa2f355042209154029842ba1abd43.tar.bz2
virtio-mmio: add error check for platform_get_irq
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>
Diffstat (limited to 'drivers/virtio/virtio_mmio.c')
-rw-r--r--drivers/virtio/virtio_mmio.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index f363fbeb5ab0..e09edb5c5e06 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -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)