media: venus: firmware: fix leaked of_node references

The call to of_parse_phandle returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
drivers/media/platform/qcom/venus/firmware.c:90:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 82, but without a corresponding object release within this function.
drivers/media/platform/qcom/venus/firmware.c:94:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 82, but without a corresponding object release within this function.
drivers/media/platform/qcom/venus/firmware.c:128:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 82, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Acked-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
index 6cfa802..f81449b 100644 (file)
--- a/drivers/media/platform/qcom/venus/firmware.c
+++ b/drivers/media/platform/qcom/venus/firmware.c
@@ -87,11 +87,11 @@ static int venus_load_fw(struct venus_core *core, const char *fwname,
 
        ret = of_address_to_resource(node, 0, &r);
        if (ret)
-               return ret;
+               goto err_put_node;
 
        ret = request_firmware(&mdt, fwname, dev);
        if (ret < 0)
-               return ret;
+               goto err_put_node;
 
        fw_size = qcom_mdt_get_size(mdt);
        if (fw_size < 0) {
@@ -125,6 +125,8 @@ static int venus_load_fw(struct venus_core *core, const char *fwname,
        memunmap(mem_va);
 err_release_fw:
        release_firmware(mdt);
+err_put_node:
+       of_node_put(node);
        return ret;
 }