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Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

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Pull powerpc fix from Ben Herrenschmidt:
 "Here's one regression fix for 3.13 that I would appreciate if you
  could still pull in.  It was an "interesting" one to debug, basically
  it's an old bug that got somewhat "exposed" by new code breaking the
  boot on PA Semi boards (yes, it does appear that some people are still
  using these!)"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Check return value of instance-to-package OF call
This commit is contained in:
Linus Torvalds 2014-01-13 10:59:05 +07:00
commit a6da83f982
1 changed files with 13 additions and 9 deletions
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22
arch/powerpc/kernel/prom_init.c
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@ -1986,19 +1986,23 @@ static void __init prom_init_stdout(void)
/* Get the full OF pathname of the stdout device */
memset(path, 0, 256);
call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
val = cpu_to_be32(stdout_node);
prom_setprop(prom.chosen, "/chosen", "linux,stdout-package",
&val, sizeof(val));
prom_printf("OF stdout device is: %s\n", of_stdout_device);
prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
path, strlen(path) + 1);
/* If it's a display, note it */
memset(type, 0, sizeof(type));
prom_getprop(stdout_node, "device_type", type, sizeof(type));
if (strcmp(type, "display") == 0)
prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
/* instance-to-package fails on PA-Semi */
stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
if (stdout_node != PROM_ERROR) {
val = cpu_to_be32(stdout_node);
prom_setprop(prom.chosen, "/chosen", "linux,stdout-package",
&val, sizeof(val));
/* If it's a display, note it */
memset(type, 0, sizeof(type));
prom_getprop(stdout_node, "device_type", type, sizeof(type));
if (strcmp(type, "display") == 0)
prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
}
}
static int __init prom_find_machine_type(void)