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um: virt-pci: set device ready in probe()

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Call virtio_device_ready() to make this driver work after commit
b4ec69d7e09 ("virtio: harden vring IRQ"), since the driver uses the
virtqueues in the probe function.  (The virtio core sets the device
ready when probe returns.)

Fixes: 8b4ec69d7e ("virtio: harden vring IRQ")
Fixes: 68f5d3f3b6 ("um: add PCI over virtio emulation driver")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Message-Id: <20220610151203.3492541-1-vincent.whitchurch@axis.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Johannes Berg <johannes@sipsolutions.net>
This commit is contained in:
Vincent Whitchurch 2022-06-10 17:12:03 +02:00 committed by Michael S. Tsirkin
parent 00d1f54647
commit eacea84459
1 changed files with 6 additions and 1 deletions
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7
arch/um/drivers/virt-pci.c
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@ -544,6 +544,8 @@ static int um_pci_init_vqs(struct um_pci_device *dev)
dev->cmd_vq = vqs[0];
dev->irq_vq = vqs[1];
virtio_device_ready(dev->vdev);
for (i = 0; i < NUM_IRQ_MSGS; i++) {
void *msg = kzalloc(MAX_IRQ_MSG_SIZE, GFP_KERNEL);
@ -587,7 +589,7 @@ static int um_pci_virtio_probe(struct virtio_device *vdev)
dev->irq = irq_alloc_desc(numa_node_id());
if (dev->irq < 0) {
err = dev->irq;
goto error;
goto err_reset;
}
um_pci_devices[free].dev = dev;
vdev->priv = dev;
@ -604,6 +606,9 @@ static int um_pci_virtio_probe(struct virtio_device *vdev)
um_pci_rescan();
return 0;
err_reset:
virtio_reset_device(vdev);
vdev->config->del_vqs(vdev);
error:
mutex_unlock(&um_pci_mtx);
kfree(dev);