[PATCH] virtio: pci: fix bug of virtio_pci_map_capability

[Xiang W]

The bar of the structure virtio_pci_cap is the index, and each base
address occupies 4 bytes, so it needs to be multiplied by 4.

This patch fixes a bug reported by Felix Yan
https://lists.denx.de/pipermail/u-boot/2022-August/492779.html

Signed-off-by: Xiang W <wxjstz at 126.com>
Tested-by: Felix Yan <felixonmars at archlinux.org>
---
 drivers/virtio/virtio_pci_modern.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index 880a12cc28..cfde4007f5 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -466,7 +466,7 @@ static void __iomem *virtio_pci_map_capability(struct udevice *udev,
 	unsigned long mask =
 			PCI_REGION_TYPE | PCI_REGION_SYS_MEMORY | PCI_REGION_RO;
 	unsigned long flags = PCI_REGION_MEM;
-	u8 *p = dm_pci_map_bar(udev, PCI_BASE_ADDRESS_0 + cap->bar, cap->offset,
+	u8 *p = dm_pci_map_bar(udev, PCI_BASE_ADDRESS_0 + 4 * cap->bar, cap->offset,
 			       cap->length, mask, flags);
 
 	return (void __iomem *)p;
-- 
2.30.2