PM / Domains: Fix bad of_node_put() in failure paths of genpd_dev_pm_attach()

It looks like these meant to be unreffing the
of_parse_phandle_with_args() node, since the error paths above it
don't do of_node_put.  That function returns a new ref in pd_args.np,
though, not a new ref on dev->of_node.  Also, it would have leaked the
ref in the success case.

Fixes "ERROR: Bad of_node_put()" on bcm2835 in the -EPROBE_DEFER case.

Fixes: aa42240ab254 (PM / Domains: Add generic OF-based PM domain look-up)
Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org>
Cc: 3.18+ <stable@vger.kernel.org> # 3.18+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index f932058..4e3a1f1 100644 (file)
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1773,10 +1773,10 @@ int genpd_dev_pm_attach(struct device *dev)
        }
 
        pd = of_genpd_get_from_provider(&pd_args);
+       of_node_put(pd_args.np);
        if (IS_ERR(pd)) {
                dev_dbg(dev, "%s() failed to find PM domain: %ld\n",
                        __func__, PTR_ERR(pd));
-               of_node_put(dev->of_node);
                return -EPROBE_DEFER;
        }
 
@@ -1794,7 +1794,6 @@ int genpd_dev_pm_attach(struct device *dev)
        if (ret < 0) {
                dev_err(dev, "failed to add to PM domain %s: %d",
                        pd->name, ret);
-               of_node_put(dev->of_node);
                goto out;
        }