[PATCH v5.4.y 6/6] rpmsg: Fix possible refcount leak in rpmsg_register_device_override()

[Lee Jones <lee@kernel.org>]

From: Hangyu Hua <hbh25y@gmail.com>

commit d7bd416d35121c95fe47330e09a5c04adbc5f928 upstream.

rpmsg_register_device_override need to call put_device to free vch when
driver_set_override fails.

Fix this by adding a put_device() to the error path.

Fixes: bb17d110cbf2 ("rpmsg: Fix calling device_lock() on non-initialized device")
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20220624024120.11576-1-hbh25y@gmail.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Lee Jones <lee@kernel.org>
---
 drivers/rpmsg/rpmsg_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index 9041d65bc8af6..865d977668cca 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -551,6 +551,7 @@ int rpmsg_register_device_override(struct rpmsg_device *rpdev,
 					  strlen(driver_override));
 		if (ret) {
 			dev_err(dev, "device_set_override failed: %d\n", ret);
+			put_device(dev);
 			return ret;
 		}
 	}
-- 
2.42.0.820.g83a721a137-goog