powerpc/kexec_file: print error string on usable memory property update failure

Print the FDT error description along with the error message if failed
to set the "linux,drconf-usable-memory" property in the kdump kernel's
FDT.

Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Acked-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221216122708.182154-1-sourabhjain@linux.ibm.com

diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c
index ab80c49..110d28b 100644 (file)
--- a/arch/powerpc/kexec/file_load_64.c
+++ b/arch/powerpc/kexec/file_load_64.c
@@ -690,7 +690,8 @@ static int update_usable_mem_fdt(void *fdt, struct crash_mem *usable_mem)
                ret = fdt_setprop(fdt, node, "linux,drconf-usable-memory",
                                  um_info.buf, (um_info.idx * sizeof(u64)));
                if (ret) {
-                       pr_err("Failed to update fdt with linux,drconf-usable-memory property");
+                       pr_err("Failed to update fdt with linux,drconf-usable-memory property: %s",
+                              fdt_strerror(ret));
                        goto out;
                }
        }