[PATCH 4.2 053/110] ARM: EXYNOS: Fix double of_node_put() when parsing child power domains

From: Greg Kroah-Hartman
Date: Fri Nov 06 2015 - 15:41:37 EST

4.2-stable review patch. If anyone has any objections, please let me know.


From: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>

commit 51a6256b00008a3c520f6f31bcd62cd15cb05960 upstream.

On each next iteration of for_each_compatible_node() the reference
counter for current device node is already decreased by the loop
iterator. The manual call to of_node_get() is required only on loop
break which is not happening here.

The double of_node_get() (with enabled CONFIG_OF_DYNAMIC) lead to
decreasing the counter below expected, initial value.

Fixes: fe4034a3fad7 ("ARM: EXYNOS: Add missing of_node_put() when parsing power domains")
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

arch/arm/mach-exynos/pm_domains.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

--- a/arch/arm/mach-exynos/pm_domains.c
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -200,15 +200,15 @@ no_clk:
args.args_count = 0;
child_domain = of_genpd_get_from_provider(&args);
if (IS_ERR(child_domain))
- goto next_pd;
+ continue;

if (of_parse_phandle_with_args(np, "power-domains",
"#power-domain-cells", 0, &args) != 0)
- goto next_pd;
+ continue;

parent_domain = of_genpd_get_from_provider(&args);
if (IS_ERR(parent_domain))
- goto next_pd;
+ continue;

if (pm_genpd_add_subdomain(parent_domain, child_domain))
pr_warn("%s failed to add subdomain: %s\n",
@@ -216,8 +216,6 @@ no_clk:
pr_info("%s has as child subdomain: %s.\n",
parent_domain->name, child_domain->name);
- of_node_put(np);

return 0;

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