From dd0f7bcf3b29a0b6095622b7dd83279b0a3dbfe4 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Thu, 4 May 2023 16:55:01 -0600
Subject: [PATCH] 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>
---
drivers/pci/pci-uclass.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 9343cfc62a..8d27e40338 100644
--- 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__);
--
2.39.5