[PATCH] pmdomain: bcm: bcm2835: handle genpd provider registration errors

[Pengpeng Hou <pengpeng@iscas.ac.cn>]

bcm2835_power_probe() initializes all power domains and then registers
the onecell genpd provider, but ignores of_genpd_add_provider_onecell()
failures. Probe can therefore return success even though no provider was
published.

Check the provider registration return value and jump to the existing
cleanup path on failure.

Fixes: 670c672608a1 ("soc: bcm: bcm2835-pm: Add support for power domains under a new binding.")
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
---
 drivers/pmdomain/bcm/bcm2835-power.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/pmdomain/bcm/bcm2835-power.c b/drivers/pmdomain/bcm/bcm2835-power.c
index b76d74e38..68a0a7a8c 100644
--- a/drivers/pmdomain/bcm/bcm2835-power.c
+++ b/drivers/pmdomain/bcm/bcm2835-power.c
@@ -677,7 +677,12 @@ static int bcm2835_power_probe(struct platform_device *pdev)
 	if (ret)
 		goto fail;
 
-	of_genpd_add_provider_onecell(dev->parent->of_node, &power->pd_xlate);
+	ret = of_genpd_add_provider_onecell(dev->parent->of_node,
+					    &power->pd_xlate);
+	if (ret) {
+		dev_err_probe(dev, ret, "failed to add genpd provider\n");
+		goto fail;
+	}
 
 	dev_info(dev, "Broadcom BCM2835 power domains driver");
 	return 0;
-- 
2.50.1 (Apple Git-155)