[PATCH] powercap: arm_scmi: Fix potential stale zones after a skipped leaf

[Guangshuo Li <liguangshuo@mail.sdu.edu.cn>]

scmi_zones_register() skips leaf zones that cannot be registered, but
returns the last leaf error when that leaf ends the traversal. Probe
then fails without unregistering the successfully registered zones,
whose private data is device-managed.

Return success after completing the traversal. Keep the existing error
return and full rollback for a failed non-leaf zone.

This issue was found by our static analysis tool under development.

Fixes: 3e767d6850f8 ("powercap: arm_scmi: Remove recursion while parsing zones")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <liguangshuo@mail.sdu.edu.cn>
---
 drivers/powercap/arm_scmi_powercap.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/powercap/arm_scmi_powercap.c b/drivers/powercap/arm_scmi_powercap.c
index ab66e9a3b1e2..edc1e2823ec3 100644
--- a/drivers/powercap/arm_scmi_powercap.c
+++ b/drivers/powercap/arm_scmi_powercap.c
@@ -407,6 +407,7 @@ static int scmi_zones_register(struct device *dev,
 							       node);
 		}
 	}
+	ret = 0;
 
 out:
 	kfree(zones_stack);

base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4