[PATCH 11/12] pci: ls_pcie_g4: Add size check for config resource

[Wasim Khan]

resource "config" is required to have minimum 1KB space.

Signed-off-by: Wasim Khan <wasim.khan at nxp.com>
---
 drivers/pci/pcie_layerscape_gen4.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/pci/pcie_layerscape_gen4.c b/drivers/pci/pcie_layerscape_gen4.c
index 0226bde..f9e3e04 100644
--- a/drivers/pci/pcie_layerscape_gen4.c
+++ b/drivers/pci/pcie_layerscape_gen4.c
@@ -455,6 +455,7 @@ static int ls_pcie_g4_probe(struct udevice *dev)
 	u32 link_ctrl_sta;
 	u32 val;
 	int ret;
+	fdt_size_t cfg_size;
 
 	pcie->bus = dev;
 
@@ -488,6 +489,14 @@ static int ls_pcie_g4_probe(struct udevice *dev)
 		return ret;
 	}
 
+	cfg_size = fdt_resource_size(&pcie->cfg_res);
+	if (cfg_size < SZ_1K) {
+		printf("PCIe%d: %s Invalid size(0x%x) for resource \"config\",
+		       expected minimum 0x%x \n", PCIE_SRDS_PRTCL(pcie->idx),
+		       dev->name, cfg_size, SZ_1K);
+		return 0;
+	}
+
 	pcie->cfg = map_physmem(pcie->cfg_res.start,
 				fdt_resource_size(&pcie->cfg_res),
 				MAP_NOCACHE);
-- 
2.7.4