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virtio/virtio_pci_legacy_dev: ensure the correct return value 

When pci_iomap return NULL, the return value is zero.

Signed-off-by: Peng Hao <flyingpeng@tencent.com>
Link: https://lore.kernel.org/r/20211222112014.87394-1-flyingpeng@tencent.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Peng Hao 2021-12-22 19:20:14 +08:00 committed by Michael S. Tsirkin
parent cf4a4493ff
commit 49814ce9e2
1 changed files with 3 additions and 1 deletions
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4
drivers/virtio/virtio_pci_legacy_dev.c
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@ -45,8 +45,10 @@ int vp_legacy_probe(struct virtio_pci_legacy_device *ldev)
return rc;
ldev->ioaddr = pci_iomap(pci_dev, 0, 0);
if (!ldev->ioaddr)
if (!ldev->ioaddr) {
rc = -EIO;
goto err_iomap;
}
ldev->isr = ldev->ioaddr + VIRTIO_PCI_ISR;