[src/netbsd-8]: src/sys/dev/fdt Pull up following revision(s) (requested by j...

[snj <snj%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a19144f03d4e
branches:  netbsd-8
changeset: 850843:a19144f03d4e
user:      snj <snj%NetBSD.org@localhost>
date:      Thu Jul 20 01:20:07 2017 +0000

description:
Pull up following revision(s) (requested by jmcneill in ticket #147):
        sys/dev/fdt/fdt_subr.c: revision 1.17
Fix a problem with fdtbus_get_phandle where we were passing size -1 to
kmem_alloc when the property was not found. This seemed to work with
DIAGNOSTIC kernels, but panics in vmem with a non-DIAGNOSTIC kernel.

diffstat:

 sys/dev/fdt/fdt_subr.c |  22 +++++++---------------
 1 files changed, 7 insertions(+), 15 deletions(-)

diffs (50 lines):

diff -r 93034b9d7658 -r a19144f03d4e sys/dev/fdt/fdt_subr.c
--- a/sys/dev/fdt/fdt_subr.c    Thu Jul 20 01:18:42 2017 +0000
+++ b/sys/dev/fdt/fdt_subr.c    Thu Jul 20 01:20:07 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: fdt_subr.c,v 1.13.2.1 2017/07/18 19:13:09 snj Exp $ */
+/* $NetBSD: fdt_subr.c,v 1.13.2.2 2017/07/20 01:20:07 snj Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,11 +27,10 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fdt_subr.c,v 1.13.2.1 2017/07/18 19:13:09 snj Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fdt_subr.c,v 1.13.2.2 2017/07/20 01:20:07 snj Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
-#include <sys/kmem.h>
 
 #include <libfdt.h>
 #include <dev/fdt/fdtvar.h>
@@ -108,22 +107,15 @@
 fdtbus_get_phandle(int phandle, const char *prop)
 {
        u_int phandle_ref;
-       u_int *buf;
+       const u_int *buf;
        int len;
 
-       len = OF_getproplen(phandle, prop);
-       if (len < sizeof(phandle_ref))
+       buf = fdt_getprop(fdtbus_get_data(),
+           fdtbus_phandle2offset(phandle), prop, &len);
+       if (buf == NULL || len < sizeof(phandle_ref))
                return -1;
 
-       buf = kmem_alloc(len, KM_SLEEP);
-
-       if (OF_getprop(phandle, prop, buf, len) != len) {
-               kmem_free(buf, len);
-               return -1;
-       }
-
-       phandle_ref = fdt32_to_cpu(buf[0]);
-       kmem_free(buf, len);
+       phandle_ref = be32dec(buf);
 
        return fdtbus_get_phandle_from_native(phandle_ref);
 }