[PATCH] ata: libahci_platform: Fix device reference leak in ahci_platform_get_resources()

[Wentao Liang]

of_find_device_by_node() takes a reference on the port platform device,
which is only used to look up its port regulator and is never released,
neither on success nor on the error paths. Drop the reference with
put_device() once the regulator has been obtained, which covers both the
success and error paths.

Fixes: c7d7ddee7e24 ("ata: libahci: Allow using multiple regulators")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 drivers/ata/libahci_platform.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index 6e072d681341..14a47e0bddd4 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -624,6 +624,7 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
 			if (port_dev) {
 				rc = ahci_platform_get_regulator(hpriv, port,
 								&port_dev->dev);
+				put_device(&port_dev->dev);
 				if (rc == -EPROBE_DEFER)
 					goto err_out;
 			}
-- 
2.34.1