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Devicetree fix for v4.0-rc6 

Simple bugfix for bad device tree data on the PA-Semi platform
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Merge tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux

Pull devicetree fix from Grant Likely:
 "Simple bugfix for bad device tree data on the PA-Semi platform"

* tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux:
  drivers/of: Add empty ranges quirk for PA-Semi
This commit is contained in:
Linus Torvalds 2015-04-03 10:15:19 -07:00
parent b010a0f77a 41d9489319
commit ccc20a3317
1 changed files with 8 additions and 3 deletions
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11
drivers/of/address.c
View File

@ -450,12 +450,17 @@ static struct of_bus *of_match_bus(struct device_node *np)
return NULL;
}
static int of_empty_ranges_quirk(void)
static int of_empty_ranges_quirk(struct device_node *np)
{
if (IS_ENABLED(CONFIG_PPC)) {
/* To save cycles, we cache the result */
/* To save cycles, we cache the result for global "Mac" setting */
static int quirk_state = -1;
/* PA-SEMI sdc DT bug */
if (of_device_is_compatible(np, "1682m-sdc"))
return true;
/* Make quirk cached */
if (quirk_state < 0)
quirk_state =
of_machine_is_compatible("Power Macintosh") ||
@ -490,7 +495,7 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus,
* This code is only enabled on powerpc. --gcl
*/
ranges = of_get_property(parent, rprop, &rlen);
if (ranges == NULL && !of_empty_ranges_quirk()) {
if (ranges == NULL && !of_empty_ranges_quirk(parent)) {
pr_debug("OF: no ranges; cannot translate\n");
return 1;
}