memory: renesas-rpc-if: fix platform-device leak in error path

BugLink: https://bugs.launchpad.net/bugs/1969857
commit b452dbf24d7d9a990d70118462925f6ee287d135 upstream.

Make sure to free the flash platform device in the event that
registration fails during probe.

Fixes: ca7d8b980b67 ("memory: add Renesas RPC-IF driver")
Cc: stable@vger.kernel.org      # 5.8
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20220303180632.3194-1-johan@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-if.c
index 86187022330021bf315d155f7ce73eda5b73247e..2a4c1f94bfa07e1425e70b8836f5053a8ea07331 100644 (file)
--- a/drivers/memory/renesas-rpc-if.c
+++ b/drivers/memory/renesas-rpc-if.c
@@ -579,6 +579,7 @@ static int rpcif_probe(struct platform_device *pdev)
        struct platform_device *vdev;
        struct device_node *flash;
        const char *name;
+       int ret;
 
        flash = of_get_next_child(pdev->dev.of_node, NULL);
        if (!flash) {
@@ -602,7 +603,14 @@ static int rpcif_probe(struct platform_device *pdev)
                return -ENOMEM;
        vdev->dev.parent = &pdev->dev;
        platform_set_drvdata(pdev, vdev);
-       return platform_device_add(vdev);
+
+       ret = platform_device_add(vdev);
+       if (ret) {
+               platform_device_put(vdev);
+               return ret;
+       }
+
+       return 0;
 }
 
 static int rpcif_remove(struct platform_device *pdev)