[PATCH v2] gpu: host1x: Fix device reference leak in host1x_device_parse_dt() error path

[Guangshuo Li <lgs201920130244@gmail.com>]

After device_initialize(), the embedded struct device in struct
host1x_device should be released through the device core with
put_device().

In host1x_device_add(), if host1x_device_parse_dt() fails, the current
error path frees the object directly with kfree(device). That bypasses
the normal device lifetime handling and leaks the reference held on the
embedded struct device.

Fix this by using put_device() in the host1x_device_parse_dt() failure
path.

Fixes: f4c5cf88fbd50 ("gpu: host1x: Provide a proper struct bus_type")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
---
v2:
  - add Cc: stable@vger.kernel.org

 drivers/gpu/host1x/bus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c
index 723a80895cd4..f97567e6ae87 100644
--- a/drivers/gpu/host1x/bus.c
+++ b/drivers/gpu/host1x/bus.c
@@ -452,7 +452,7 @@ static int host1x_device_add(struct host1x *host1x,
 
 	err = host1x_device_parse_dt(device, driver);
 	if (err < 0) {
-		kfree(device);
+		put_device(&device->dev);
 		return err;
 	}
 
-- 
2.43.0