[PATCH 6.1.y 2/2] ata: libahci_platform: Fix device reference leak in ahci_platform_get_resources()

[Sasha Levin <sashal@kernel.org>]

From: Wentao Liang <vulab@iscas.ac.cn>

[ Upstream commit 0d1cb83337f13af082afb68b28d3fdfe29cde7fb ]

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@vger.kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Link: https://lore.kernel.org/r/20260915065933.1733061-1-vulab@iscas.ac.cn
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/ata/libahci_platform.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index 50aaa82d4971a..6ed700a02df43 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -622,10 +622,10 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
 			of_platform_device_create(child, NULL, NULL);
 
 			port_dev = of_find_device_by_node(child);
-
 			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;
 			}
-- 
2.53.0