pci: coreboot: Don't read regions when booting

When U-Boot is the second-stage bootloader, PCI is already set up. We
cannot read the regions from the device tree. There is no point anyway,
since PCI devices have already been allocated according to the regions
and it is not safe for U-Boot to make any changes.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Fixes: f2ebaaa9f38d ("pci: Handle failed calloc in decode_regions()")
Tested-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 9343cfc..8d27e40 100644 (file)
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -973,6 +973,10 @@ static int decode_regions(struct pci_controller *hose, ofnode parent_node,
        int len;
        int i;
 
+       /* handle booting from coreboot, etc. */
+       if (!ll_boot_init())
+               return 0;
+
        prop = ofnode_get_property(node, "ranges", &len);
        if (!prop) {
                debug("%s: Cannot decode regions\n", __func__);