[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.k...@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