[PATCH AUTOSEL 5.1 026/219] media: venus: firmware: fix leaked of_node references

Sasha Levin
2019-07-15T15:05:54Z

From: Wen Yang <wen.yang99@zte.com.cn>

[ Upstream commit 2c41cc0be07b5ee2f1167f41cd8a86fc5b53d82c ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/platform/qcom/venus/firmware.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
index 6cfa8021721e..f81449b400c4 100644
--- 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;
}

--
2.20.1